Phase Transition Enthalpy Measurements of Organic and ...chickosj/JSCPUBS/PhaseChange Enthalpies.pdf · Phase Transition Enthalpy Measurements of Organic and Organometallic Compounds.

Phase Transition Enthalpy Measurements of Organic and OrganometallicCompounds. Sublimation, Vaporization and Fusion Enthalpies From

1880 to 2010

William Acree, Jr.Department of Chemistry, University of North Texas, Denton, Texas 76203

James S. ChickosaDepartment of Chemistry and Biochemistry, University of MissouriSt. Louis, One University Boulevard, St. Louis, Missouri 63121

Received 14 January 2010; accepted 15 January 2010; published online 4 October 2010

A compendium of phase change enthalpies published within the period 18802010 isreported. Phase change enthalpies including fusion, vaporization, and sublimation areincluded for organic, organometallic, and a few inorganic compounds. This compendiumis a combination of three previous series focusing on phase change enthalpies updated to2009. Sufficient data are presently available for some compounds to permit thermody-namic cycles to be constructed, an important manner of evaluating the reliability of themeasurements. Temperature adjustments of phase change enthalpies from the temperatureof measurement to the standard reference temperature, T=298.15 K, are briefly diss-cussed and a protocol for doing so is illustrated. 2010 American Institute of Physics.doi:10.1063/1.3309507

Key words: Vaporization enthalpy; fusion enthalpy; sublimation enthalpy; compendium.

CONTENTS

1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12. Phase Change Enthalpies. . . . . . . . . . . . . . . . . . . 2

2.1. Estimation of heat capacities. . . . . . . . . . . . 22.2. Vaporization enthalpies. . . . . . . . . . . . . . . . . 52.3. Sublimation enthalpies. . . . . . . . . . . . . . . . . 62.4. Fusion enthalpies. . . . . . . . . . . . . . . . . . . . . . 62.5. Sample phase change enthalpy adjustment

to T=298.15 K. . . . . . . . . . . . . . . . . . . . . . . 63. The Phase Change Enthalpy Compendium. . . . . 74. References for Secs. 13. . . . . . . . . . . . . . . . . . . 85. References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 872

List of Tables

1. Group values for estimation of liquid land solid s heat capacity at T=298.15 Kvalues in brackets are considered tentativevalues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2. Some estimations of liquid and solid heatcapacities J mol1 K1 at T=298.15 K. . . . . . . 5

3. Thermochemical cyclics using Eq. 1. . . . . . . . . 74. Acronyms used in tables. . . . . . . . . . . . . . . . . . . . 85. Phase change enthalpies of C1 to C4 organic

compounds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96. Phase change enthalpies of C5 to C6 organic






compounds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68912. Phase change enthalpies of organometallic and

inorganic compounds. . . . . . . . . . . . . . . . . . . . . . 764

List of Figures

1. A hypothetical molecule illustrating thedifferent carbon environments as defined inTable 1A.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2. A hypothetical molecule illustrating thedifferent functional groups defined in Table1B.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1. Introduction

Transition enthalpy measurements, that include measure-ments of sublimation, vaporization, and fusion of organiccompounds, have been reported for well over 100 years.These properties find use in a number of disciplines thatinclude chemical and enviromental engineering, physics, andchemistry. The magnitude of these properties, when viewed

aElectronic mail: [email protected] 2010 American Institute of Physics.

0047-2689/2010/394/043101/942/$47.00 J. Phys. Chem. Ref. Data, Vol. 39, No. 4, 2010043101-1

in perspective, provides valuable incite into the nature ofboth intra- and intermolecular interactions and thus are ofinterest to both experimentalists and theoreticians. Whilegenerally weaker than the chemical bond, the interactionsresponsible for these enthalpies are similar to those respon-sible for the self-assembly that occurs in everything fromliquid crystals to biological systems.

The sheer number of measurements reported in the litera-ture is testimony to the importance of these properties inproviding an understanding of our physical world. One goalof this compendium is to bring together in one location mea-surements that often are scattered in the literature, sometimesin obscure places. Additionally, some of these measurementshave significant errors associated with the property reported.These uncertainties are often not easily discernable, even tothose familiar with the field. Despite significant improve-ment in instrumentation over the years, even recent measure-ments have errors significantly larger than reported. Providedall necessary transition enthalpies are available, an evalua-tion of the thermodynamic consistancy of the values reportedis possible. This compendium is an effort to compile thesephase change enthalpies in a manner such that an assessmentcan be made as quantitatively as the data permits.

Equation 1 is the thermodynamic equality that relatesphase change enthalpies, fusion, vaporization, and sublima-tion enthalpies but only if all enthalpies are referenced to acommon temperature. Since experimental fusion enthalpiesmeasured at ambient pressures are confined to the tempera-ture Tfus, this equality is only applicable at the fusion tem-perature unless each enthalpy can be adjusted for tempera-ture. Since T=298.15 K is the usual temperature ofreference, adjustment of each of these enthalpies to T=298.15 K is preferable. A number of methods, some experi-mental and others computational, have been used to adjustboth vaporization and sublimation enthalpies to T=298.15 K. A number of these have been summerized inprevious compilations 1987CHI, 2003CHI/ACR2,1999CHI/NIC. The relationships outlined in this compen-dium for adjusting sublimation and vaporization enthalpies,those most familiar to the authors, have been in use for sometime and have given acceptable results. Fusion enthalpieshave been adjusted by combining the relationships used toadjust vaporization and sublimation enthalpies. The protocolis described below,

subHmT = vapHmT + fusHmT . 1

2. Phase Change Enthalpies

As noted above, phase change enthalpies are temperaturedependent. Therefore, to adjust a phase change enthalpy fortemperature requires the heat capacity of the two phases inquestion. For sublimation enthalpies, while the heat capacityof the solid, Cp,m s, 298.15 K, may be available, the heatcapacity of the corresponding gas phase value, Cp,m g,298.15 K, is generally not. Similarly for vaporization en-thalpies, the experimental heat capacity of the liquid at T

=298.15 K, Cp,m l, 298.15 K, may be available, experi-mental data for the corresponding gas phase are usually lack-ing. For fusion enthalpies requiring both Cp,m s, 298.15 Kand Cp,m l, 298.15 K for this adjustment, only one of thesetwo properties is generally available at T=298.15 K. As ameans of circumventing the lack of sufficient experimentaldata, empirical and theoretical relationships have been devel-oped to adjust solid and liquid phase change enthalpies withtemperature. Many of the phase change enthalpies reportedthis compilation have been adjusted to T=298.15 K by theauthors. The reader should consult the original literature todetermine how this adjustment was made. In cases where thephase change enthalpy is reported only at the mean tempera-ture of measurement, a few empirical relationships that canbe used to adjust each respective phase change are discussedbriefly below.

2.1. Estimation of heat capacities

A number of methods have been developed for the estima-tion of heat capacities 1990LYM/REE, 1908KOL/KUK,1993CHI/HES. The method employed in this article is amethod developed by the authors and shown to give reason-ably good temperature adjustments when used in combina-tion with the equations to be described below 1998CHI,1999SAB/XU, 2008ROU/TEM. The method is based ongroup contributions. The group values used in the esti-mation of Cp,ml ,298.15 K and Cp,ms ,298.15 K are pro-vided in Table 1. For reference, Figs. 1 and 2 provide anexample of a hypothetical molecule containing all of thesegroups. Each group, identified numerically in column 2 ofTable 1, can be located in these figures. Some estimationsusing examples taken from the recent literature are given inTable 2. Note that some of the group values in Table 1 re-main tentative and values for a few groups are not availablefor both condensed phases.

The calculations for t-butylbenzene using the group valuesof Table 1 are fairly straightforward and require no additionalcomments. Agreement with experiment for the solid is good.Agreement between estimated and experimental heat capaci-

CCH3

CH

CH3

CH

CH3CH3

CH2

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)(13)

(14)(15)

(16)

(17)

FIG. 1. Color online A hypothetical molecule illustrating the different car-bon environments as defined in Table 1A.

043101-2 W. ACREE, JR. AND J. S. CHICKOS

J. Phys. Chem. Ref. Data, Vol. 39, No. 4, 2010

ties for solid di-tert-butylbenzene also reported in the samearticle is not as good estimated: 296.6; expt347.8 J mol1 K1 2009CHI/STE.

Estimations of the heat capacity of 5-aminouracil are notas obvious. This compound can be modeled as containingtwo cyclic secondary amides, a cyclic tertiary and cyclic qua-ternary sp2 carbon atom and a primary sp3 nitrogen. Lessintuitive models include modeling the ring as a cyclic ureaand cyclic ketone or as a cyclic imide and cyclic secondaryamine along with a cyclic tertiary and cyclic quaternary sp2

carbon atom. All three of these estimations are illustrated inTable 2. All are in reasonable agreement with the experimen-tal value 1907ZIE/SZT. In this case, the less intuitive mod-els give a slightly better agreement with experiment. Sincegroup values for liquid cyclic ureas and cyclic imides are notavailable and cannot be used for the vaporization and fusionenthalpy temperature adjustments described below, the valuefor the more intuitive model should probably be used forfusion enthalpy adjustments. The heat capacity of5-aminouracil can also be evaluted as its tautomer, 2,4-dihydroxy-5-aminopyrimidine. For comparative purposes,this estimation is also included in the table. In this case, theheat capacity of the solid is reproduced reasonably well but alarger discepancy is observed between the predicted heat ca-pacities of the liquid. In addition to 5-aminouracil, the heatcapacities of a number of other solid uracils are reported inthe same article 1907ZIE/SZT: uracil estimated: 124.6;

expt: 131.8; 6-aminouracil estimated: 135; expt: 147.0,6-amino-1-methyluracil estimated: 177.9; expt: 166.2;6-amino-1,3-dimethyluracil estimated: 220.9; expt:189 J mol1 K1. The estimated values were calculated us-ing two cyclic amides to model the uracil ring. The values

differ slightly from those reported by the authors of the ar-

ticle who used the same method but different groups to

model the tertiary and quaternary sp2 carbon groups

1907ZIE/SZT.Calculations for 2,9-dimethyl-1,10-phenanthrolene are

fairly straightforward and in good agreement with the experi-

mental heat capacity of the solid 2007BON/CAT. The au-thors of this work also report the heat capacity of solid 1,10-

phenanthrolene as 115 J mol1 K1 at T=298.15 K. The

estimated value for the solid at this temperature is

201.4 J mol1 K1 calculations not shown. In this case theexperimental value appears to be remarkably small when

compared to the estimated value and to the value of naph-

thalene, 165 J mol1 K1 300 K, used as a standard.Other group additivity methods of varying complexity

have been reported for the estimation of Cp,ml ,298.15 K.References for these and an alternative method for calculat-

ing heat capacities can be found in the recent work of Kolska

et al. 1908KOL/KUK.

O

O

O

O

O

O

O

HO2C

NC

O CO2CH3O

NO2

S

NH

CHO

NH2N

NHO

N

O

O

O

H2N

NH

NH

ONH

OO

S

NNH

O NCO

SHCl

NH

NH2

NH

Br I

HO

O

OO

FNH NH2

O

SO2OS

SO2NH2

HS

N

N

NH

COCl

N

O

O

O

NH

SS

S

O

S

O

O

(1)

(4) (5)

(3)

(6)

(9)(10)

(11)

(13)

(12)

(14) (15)

(16)

(17)

(18)

(19)

(20)

(21)

(22)

(23)

(27)

(24)

(26)

(25)

(28)

(29)

(32)

(2)

(31)

(30)

(33)

(36)

(35)

(34)

(37)

(38)

(39)

(7)

(40)

(8)

(41)

(43)

(45)

(42)(44)

FIG. 2. Color online A hypothetical molecule illustrating the different functional groups defined in Table 1B.

PHASE TRANSITION ENTHALPY MEASUREMENTS 043101-3


TABLE 1. Group values for estimation of liquid l and solid s heat capacity at T=298.15 K values in brackets are considered tentative values

Group AtomslJ mol1 K1

sJ mol1 K1

A. Hydrocarbon Groupsprimary sp3 carbon CH3 34.9 36.6secondary sp3 carbon CH2 31.9 26.9tertiary sp3 carbon CH 22.4 9.0quaternary sp3 carbon C 14.0 5.0secondary sp2 carbon vCH2 25.8 46.0tertiary sp2 carbon vCH 27.8 21.4quaternary sp2 carbon vC 21.7 6.9tertiary sp carbon wCH 34.3 37.1quaternary sp carbon wC 28.9 15.5tertiary aromatic sp2 carbon vCH 21.8 17.5quaternary aromatic sp2 vC 15.3 8.5internal quaternary aromatic carbona vC 16 9.1cyclic secondary sp3 carbon CH2 25.9 24.6cyclic tertiary sp3 carbon CH 20.6 11.7cyclic quaternary sp3 carbon C 18 6.1cyclic tertiary sp2 vCH 21.8 15.9cyclic quaternary sp2 vCR 21.2 4.7B. Functional Groupshydroxyl group alcohols, phenols OH 53.1 23.5fluorine F 16.2 24.8chlorine Cl 30.8 28.7bromine Br 34.6 32.4iodine I 39.1 27.9nitrile CwN 47.7 42.3carboxylic acid COOH 87.4 53.1acid chloride CvOCl 62.8 60.2aldehyde CvOH 57.7 84.5ketone CvO 51.5 28.0cyclic ketone CvO 46.4 34.3ester CvOO 63.2 40.3lactone CvOO 67.4 45.2cyclic carbonate OCvOO 92.0 68.2cyclic anhydride CvOOCvO 80.3ether O 29.8 49.8cyclic ether O 24.6 9.7isocyanate OvCvN 58.2 52.7nitro group NO2 58.6 56.1thiol SH 49.0 51.9primary sp3 nitrogen NH2 59.4 21.6secondary sp3 nitrogen NH 51.0 0.3tertiary sp3 nitrogen N 22.0 31.5tertiary sp2 nitrogen vN 44.4 10.7cyclic secondary sp3 nitrogen NH 46.0 23.9cyclic tertiary sp3 nitrogen N 28.6 1.2cyclic tertiary sp2 nitrogen vN 20.7 13.9primary amide CvONH2 41.0 54.4secondary amide CvONH 79.9 44.4tertiary amide CvON 82.4cyclic secondary amide CvONH 92.0 46.4cyclic tertiary amide CvON 170 52.7Carbamate NHCvOO 76.1cyclic imide CvONHCvO 74.1monsubstituted urea NHCvONH2 82.8cyclic urea NHCvONH 63.6monsubstituted guanidine NHCvNHNH2 59.4



TABLE 1. Group values for estimation of liquid l and solid s heat capacity at T=298.15 K values in brackets are considered tentativevaluesContinued

Group AtomslJ mol1 K1

sJ mol1 K1

sulfide S 40.3 116cyclic sulfide S 33.8 18.2disulfide SS 74.5 41.0sulfoxide SO 83.7 47.7cyclic sulfoxide SO 31.0sulfone SO2 52.4cyclic sulfone SO2 38.7sulfonamide SO2NH2 104quaternary silicon Si 30.9 32.4tertiary aluminum Al 46.9quaternary tin Sn 58.6 77.2quaternary germanium Ge 48.1 18.9phosphine oxide PO 28.5

aAn internal quaternary carbon refers to internal carbon atoms as found in coronene or graphite.

TABLE 2. Some estimations of liquid and solid heat capacities J mol1 K1 at T=298.15 K

CH3

CH3

CH3

3 CH3+C+5vCHarom+ vC aromCp,ml ,298.15 K=334.9+14.0+521.8+15.3=243 lit 241 2009CHI/STECp,ms ,298.15 K=336.64.98+517.5+8.5=200.8

HN

NH

NH2

O

O

2 CvONH cyc+ vCH cyc+ vCR cyc+ NH2Cp,ml ,298.15 K=292+21.8+21.2+59.4=286.4Cp,ms ,298.15 K=246.4+15.9+4.73+21.6=135.0 lit 145 2007ZIE/SZT

NHCvONH cyc+ CvO cyc+ vCH cyc+ vC cyc+ NH2Cp,ms ,298.15 K=63.6+34.3+15.9+4.73+21.6=140.1

CvONHCvO cyc+ NH cyc+ vCH cyc+ vC cyc+ NH2Cp,ms ,298.15 K=74.1+23.9+15.9+4.73+21.6=140.2

N

N

OH

HO

NH2

3vC arom+ vCHarom+2vN cyc+2OH+ NH2Cp,ml ,298.15 K=315.3+ 21.8+220.7+253.1+54.9=270.2Cp,ms ,298.15 K=38.5+317.5+213.9+223.5+21.6=139.4

N

N CH3

CH3

6vC arom+ vCHarom+2vN cyc+2OH+ NH2Cp,m1,298.15 K=621.8+615.3+220.7+234.9=333.8Cp,ms ,298.15 K=617.5+68.5+213.9+236.6=248 lit 253 2007BON/CAT

2.2. Vaporization enthalpies

Equation 2 is an equation derived to model the differ-ences in heat capacity between the liquid and gas phases1993CHI/HOS. It has been derived by correlating vapor-ization enthalpy differences measured at temperature T andgenerally at T=298.15 K with the heat capacity of the cor-responding liquid at T=298.15 K for which reliable vapor-ization data are available. The vaporization enthalpy dataused were obtained from the critical review and data compi-lation of Majer and Svoboda 1993CHI/HOS. It has beenfound to provide satisfactory results for adjustments ranging

from approximately T=500 to 250 K 1998CHI, 1999SAB/XU, 2008ROU/TEM. The adjustments have been generallybeen applied from the mean temperature of measurement, T,to 298.15 K. Adjustments for temperatures above T=500 Kshould be viewed with caution,

vapHmo 298.15 K/kJ mol1 = vapHm

o T/K + 10.58

+ 0.26Cp,ml,298.15 K/J mol1 K1T/K

298.15/1000. 2

The term Cp,ml 298.15 K /J mol1 K1 refers to the mo-



lar heat capacity of the liquid phase at T=298.15 K; esti-mated heat capacities were used in deriving this relationship1993CHI/HES. Experimental values can also be used. Anuncertainty of 16 J mol1 has been associated with the brack-eted term in Eq. 2. Some examples using Eq. 2 are givenin Table 3.

2.3. Sublimation enthalpies

Sublimation enthalpies can also be adjusted to T=298.15 K from the mean temperature of measurement us-ing a similar relationship, Eq. 3. This equation has alsobeen derived by correlating sublimation enthalpy differences

measured at temperature T and generally at T=298.15 Kwith the estimated heat capacity of each corresponding crys-talline compound at T=298.15 K 1993CHI/HOS. Unlikevaporization enthalpy data, much less critically evaluatedsublimation enthalpy data are available. As a consequence, alarger uncertainty is associated with this adjustment,

subHmo 298.15 K/kJ mol1

= subHmo T/K + 0.75

+ 0.15Cp,ms,298.15 K/J mol1 K1T/K

298.15/1000. 3

The term Cp,ms ,298.15 K refers to the molar heat capac-ity of the solid phase at T=298.15 K. The relationship wasderived using solid heat capacities estimated by the groupadditivity method described above 1993CHI/HES. Thisequation has also been found to give satisfactory results fortemperatures up to approximately T=500 K. Group valuesused in these estimations are also summarized in Table 1. Aswith heat capacities of the liquid state, experimental heatcapacity values can be substituted for Cp,ms ,298.15 K ifavailable. When using Eq. 3, an uncertainty equal to one-third the magnitude of the total temperature adjustmentshould be assumed. While this uncertainty, arbitrarily cho-sen, is significant, some compensation is afforded by the factthat temperature adjustments of sublimation enthalpies aregenerally much smaller than the corresponding adjustmentsfor vaporization enthalpies. In cases where the experimentalsublimation enthalpy is reported by the author at T=298.15 K, the reader should consult the original literatureto determine how the temperature adjustment was achieved.A number of different methods have been used in the litera-ture for this adjustment and it has been found that somemethods provide more thermodynamically consistent resultsthan others when using Eq. 1 1998CHI.

2.4. Fusion enthalpies

Temperature adjustments for fusion enthalpies from Tfus toT=298.15 K can be achieved by noting that if Eq. 2 issubtracted from Eq. 3, the heat capacity of the gas phasecommon to both cancels and the remainder results in thedifference in molar heat capacity between the liquid andsolid phases, Cpcr, l, Eq. 4. Equation 4 has been suc-

cessfully used in combination with Eqs. 1 and 2 to predictsublimation enthalpies at T=298.15 K 2008ROU/TEM,2004BAS/CHI. An uncertainty equal to one-third the mag-nitude of the total temperature adjustment has generally beenassigned to this temperature adjustment,

fusHmo 298.15 K/kJ mol1

= fusHmTfus + trnsHmTtrns

+ 0.15Cp,ms,298.15 K 0.26Cp,ml,298.15 K

9.83Tfus/K 298.15/1000. 4

Many compounds do not exhibit solid-solid phase transitionsat temperatures below fusion. For those compounds that do,the enthalpy of the transition also needs to be added to thefusion enthalpy when using Eq. 1 if the sublimation en-thalpy was measured at temperatures below the transitiontemperature Ttrns. If the sublimation enthalpy was measuredabove T=Ttrans, the fusion enthalpy can be used directly inEq. 1 to reproduce the sublimation enthalpy. If Ttrans ex-ceeds T=298.15 K, then the transition enthalpy will need tobe added to the sublimation enthalpy to obtainsubHm

o 298.15 K.

2.5. Sample phase change enthalpy adjustment toT=298.15 K

A few examples serve to illustrate the usefulness of Eqs.14 when all three phase change enthalpies data for aparticular substance are available. These are shown in Table3. The first example, cyclohexanone, illustrates the use ofthese equations for temperature adjustments below ambienttemperature. Cyclohexanone exhibits a solid-solid phasetransition at a temperature below the temperature range usedin the sublimation enthalpy measurement and hence is notincluded in Eq. 1. Since the heat capacity of the liquidgenerally exceeds that of the solid phase, adjustment to T=298.15 K in this case actually increases the fusion enthalpyfrom 1.3 to 3.0 kJ mol1. Three vaporization enthalpies havebeen reported, in good agreement with each other when ad-justed to the reference temperature. The sublimation en-thalpy, when adjusted to the reference temperature, is attenu-ated slightly, since the heat capacity of the solid generallyexceeds that of the gas phase. The sublimation enthalpy,48.20.3 kJ mol1, is within experimental error of the meanvalue calculated using Eq. 1, 49.40.8 kJ mol1. The un-certainty in the latter value is the mean uncertainty associ-ated with each entry, and for one of the entries, the uncer-tainty associated with only the temperature adjustment.

Phenacetin illustrates a situation not uncommon with phar-maceuticals, the possible existence of polymorphism. Thefusion enthalpy of phenacetin has been reported a number oftimes. Most reports are in reasonable agreement with eachother except for one. In this case, the value is probably inerror since the first and fourth fusion enthalpy entries, whichare in disagreement, have been reported by the same researchgroup. Ignoring the fourth value, an average value of25.21.8 kJ mol1 is calculated, which when added to the



vaporization enthalpies results in two values, one of whichappears to be in much better agreeement with a single deter-mination of the sublimation enthalpy. The uncertainty infusHm

o 298 K only reflects the uncertainty in the tempera-ture adjustments.

Carbazole is another example of a substance that exhibitsa solid-solid phase transition. In this case the fusion enthalpyat T=298.15 T should include this transition since the subli-

mation enthalpy was measured at a temperature below thetransition. A solid to liquid total phase change enthalpy of15.63.5 kJ mol1 is obtained which when added to the va-porization enthalpy results in sublimation enthalpy values of97.95.1 and 91.83.5 kJ mol1. In this instance, only oneof the sublimation enthapy values calculated in this manneris consistent with the two sublimation enthalpies measureddirectly.

TABLE 3. Thermochemical cyclics using Eq. 1

EnthalpyHmTkJ mol1 T /K

Cp,ml ,298 KJ mol1 K1

Cp,ms ,298 KJ mol1 K1

Cp,mTkJ mol1

Hm298 KkJ mol1

fusHm 298 K

vapHm 298 K

kJ mol1 Referencea

C6H10O cyclohexanone

trnsHmTtrns 8.66 220.8 1980NAK/SUG

fusHmTfus 1.33 245.2 175.9 157.3 1.7 3.00.5 1980NAK/SUG

vapHm T /K 43.1 358 175.9 157.3 3.41.0 46.5 49.51.1 2006TEO/BAR

46.60.4 298 175.9 157.3 0 46.60.4 49.60.6 1995CHI/HOS44.00.1 333 175.9 157.3 2.00.6 46.00.6 49.00.8 1993AUC/MON

subHm T /K 49.3 254 175.9 157.3 1.070.3 48.20.3 1948NIT/SEK2

C10H13NO2 4-ethoxyacetanilide phenacetin

fusHmTfus 301.0 409.6 329.2 281.3 5.91.8 24.11.8 2009VEC/TOM28.8 408.3 329.2 281.3 5.91.8 22.91.8 2009PEN/ESC34.1 407.4 329.2 281.3 5.81.7 28.31.7 2006WAS/HOL

21.40.9 410.2 329.2 281.3 6.01.8 15.42.0 2004VEC/CAT31.3 407.2 329.2 281.3 5.81.7 25.41.7 1990MAN/AHU

average 25.21.8

vapHm T /K 79.01.0 459 329.2 281.3 15.52.6 94.52.6 119.63.2 2009VEC/TOM

82.6 478 329.2 281.3 17.32.9 99.92.9 125.03.4 1987STE/MALsubHm

T /K 115.5 349.5 329.2 281.3 2.20.7 117.70.7 1972WIE

C12H9N carbazole

trnsHmTtrns 0.27 420 1969ROB/SCO

fusHmTfus 26.9 518.7 281.6 197.9 11.83.5 15.43.5 2000LIS/JAM27.2 516 281.6 197.9 11.63.5 15.93.5 1996BUR/KOL

average 15.63.5

vapHm T /K 76.2 298 281.6 197.9 0 76.2 91.83.5 1996GOV/RUT

63.3 525 281.6 197.9 19.03.6 82.33.6 97.95.1 1983SIV/MAR

subHm T /K 101.21.1 355 281.6 197.9 1.70.5 102.91.2 1990JIM/ROU

97.70.3 298 281.6 197.9 0 97.70.3 1987SAB/ANTaReferences for fusion vaporization and sublimation can be found in Sec. 5.

3. The Phase Change EnthalpyCompendium

The phase change enthalpy data reported in this compen-dium have been reported over the time period of 18802010.The data are combination of three compendia published inrecent years and updated to the present 1902CHI/ACR,2003CHI/ACR, 2003CHI/ACR2, 1999CHI/ACR, 1909CHI/ACR. Vaporization enthalpies and sublimation enthalpieshave been measured for many years and numerous tech-

niques have been developed to do so. Generally, these tech-niques can be categorized into two groups, calorimetric tech-niques, in which the phase change enthalpy is measureddirectly, and techniques in which vapor pressure is measureddirectly or indirectly as a function of temperature. Providingon the experimental setup, calorimetric methods can alsoprovide vapor pressures if an effusion cell is used. Morerecently, gas chromatographic techniques have also been de-veloped to measure vaporization enthalpies. These tech-niques can provide both vaporization enthalpies and liquid



vapor pressures but since standards must be used, some care

must be used in assessing their reliability. One technique,

referred to as correlation-gas chromatography, has been

shown to be successful provided standards are chosen with

reliable values and appropriately related functional groups

2009LIP/HAN. Fusion enthalpies have generally beenmeasured by some form of calorimetry. These techniques are

described by a number of acronyms used throughout the

tables. A summary of these acronyms and their meanings can

be found in Table 4.

In some cases, the vapor pressuretemperature data re-

ported in the literature authors were analyzed by using the

Clausius Clapeyron relationship, Eq. 5, where C=0, by theauthors. The Handbook of the Thermodynamics of Organic

Compounds, by Stephenson and Malanowski 1987STE/MAL, was a useful source of vaporization enthalpy infor-mation provided in the form of Antoine Constants. Unfortu-

nately, references to the original literature data are not

provided by these authors. Vaporization enthalpies and some

sublimation enthalpies were calculated from the A, B, and C

constants reported in this compendium using Eq. 6,

log10 p kPa = A B/C + T , 5

vapHmo Tm = 2.303RBT/T + C2. 6

Phase change enthalpies for organic compounds are reported

in Tables 511. Organometallic compounds are reported in

Table 12. Organometallic compounds are arranged alphabeti-

cally according to the metal.

In Tables 512, some enthalpy values are cited without a

reference on the same line. The appropriate reference can be

found with the next value with a reference multiple enthalpyvalues were taken from the same source. In addition, inTables 512, where a value is prefixed with a U e.g., U66.021.2, this indicates unreliable data.

TABLE 4. Acronyms used in tables

A calculated from the vapor pressure data reported by themethod of least squares

AC adiabatic calorimeterB calculated from the difference of the enthalpies of

sublimation at temperature T and fusion at the meltingpoint.

BG Bourdon gaugeC calorimetric determinationCATH cathetometerCGC correlation-gas chromatographyCGC-DSC combined correlation gas chromatography-differential

scanning calorimetryCR CryoscopyDBM dibutyl pththalate manometerDM diaphram manometerDSC differential scanning calorimeterDTA differential thermal analysisE estimated valueEB ebulliometerEM electronic manometerEV evaporationF fluorescenceGC gas chromatographyGCC gas chromatography-calorimetryGS gas saturation, transpirationGSM glass spring manometerHG Heise gaugeHSA head space analysisI isoteniscopeIP inclined piston manometryKG Knudsen gaugeLE Langmuir evaporationMDSC Modulated differential scanning calorimetryME mass effusion-Knudsen effusionMEM modified entrainment methodMG McLeod GaugeMM mercury manometerMS mass spectrometryOM oil manometerPG pressure gaugeQCM quartz crystal microbalanceQF quartz fiberQR quartz resonatorRG Rodebush gaugeS-F sublimation-fusionSG spoon gaugeSRFG spinning rotor friction gaugeSTG strain gaugeT tensiometerTCM thermal conductivity manometerTE torsion effusionTGA thermal gravimetric analysisTSGC temperature scanning gas chromatographyU unreliableUV ultraviolet spectroscopyV viscocity gaugeVG viscosity gauge

4. References for Secs. 13

1972WIE H. G. Wiedemann, Thermochim. Acta. 3,355 1972.

1985MAJ/SVO V. Majer and V. Svoboda, Enthalpies ofVaporization of Organic Compounds: AC-ritical Review and Data Compilation, IU-



PAC Chemical Data Series No. 32 Black-well, Oxford, 1985.

1987CHI J. S. Chickos, in Molecular Structure andEnergetics, edited by J. F. Liebman and A.Greenberg VCH, New York, 1987, Vol.2, Chap. 3.

1987STE/MAL R. M. Stephenson and S. Malanowski,Handbook of the Thermodynamics of Or-ganic Compounds Elsevier, New York,1987.

1976WIE H. G. Wiedemann, Thermochin. Acta 3,355 1972.

1990LYM/REE Handbook of Chemical Property Estima-tion Methods, edited by W. J. Lyman, W.F. Reehl, and D. H. Rosenblatt AmericanChemical Society, Washington, D. C.,1990.

1993CHI/HES J. S. Chickos, D. G. Hesse, and J. F. Lie-bman, Struct. Chem. 4, 261 1993.

1993CHI/HOS2 J. S. Chickos, S. Hosseini, D. G. Hesse,and J. F. Liebman, Struct. Chem. 4, 2711993.

1998CHI J. S. Chickos, Thermochim. Acta 313, 191998.

1999CHI/ACR J. S. Chickos, W. E. Acree, Jr., and J. F.Liebman, J. Phys. Chem. Ref. Data 28,1535 1999.

1999CHI/NIC J. Chickos, G. Nichols, J. Wilson, M. Orf,P. Webb, and J. Wang, in Energetics ofStable Molecules and Reactive Intermedi-ates, NATO Science Series C, Vol. 535,edited by M. da Piedade Kluwer Aca-demic, Boston: MA, 1999, pp 177202

1999SAB/XU R. Sabbah, A. Xu-wu, J. S. Chickos, M.L. Plana Leitao, M. V. Roux, and L. A.Torres, Thermochim. Acta 331, 93 1999.

2002CHI/ACR J. S. Chickos and W. E. Acree, Jr., J. Phys.Chem. Ref. Data 31, 537 2002.

2003CHI/ACR J. S. Chickos and W. E. Acree, Jr., Ther-mochim. Acta 395, 59 2003.

2003CHI/ACR2 J. S. Chickos and W. E. Acree, Jr., J. Phys.Chem. Ref. Data 32, 519 2003.

2004BAS/CHI A. Bashir-Hashemi, J. S. Chickos, W.Hanshaw, H. Zhao, B. S. Farivar, and J. F.Liebman, Thermochim. Acta 424, 912004.

2007ZIE/SZT W. Zielenkiewicz and P. Szterner, J.Chem. Eng. Data 52, 624 2007.

2007BON/CAT M. G. Bonicelli, A. Catalani, G. Mariano,and S. Vecchio, Thermochim. Acta 466,69 2007.

2008KOL/KUK Z. Kolsa, J. Kukal, M. Zabransky, and V.Ruzicka, Ind. Eng. Chem. Res. 47, 20752008.

2008ROU/TEM M. V. Roux, M. Temprado, J. S. Chickos,and Y. Nagano, J. Phys. Chem. Ref. Data37, 1855 2008.

2009CHI/ACR J. S. Chickos and W. E. Acree, Jr., Ther-mochim. Acta 495, 5 2009 and supple-mental information.

2009CHI/STE R. D. Chirico and W. V. Steele, J. Chem.Thermodyn. 41, 392 2009.

2009LIP/HAN D. Lipkind, W. Hanshaw, and J. S. Chic-kos, J. Chem. Eng. Data 54, 2930 2009and references cited.

TABLE 5. Phase change enthalpies of C1 to C4 organic compounds

MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm

kJ mol1 Tm K Method Reference

CBrClF2 353-59-3 bromochlorodifluoromethanevH 268324 23.0 283 A 1987STE/MALvH 194287 23.1 272 A 1987STE/MALvH 321403 22.4 336 A 1987STE/MALvH 403427 23.1 415 A 1987STE/MALvH 178283 26.0 193 1979KUD/KUDvH 178283 18.7 268 1960GLE, 1984BOU/FRI

CBrCl3 75-62-7 bromotrichloromethanetrsH 4.62 238.2trsH 0.53 259.4fusH 2.54 267.5 AC 1991ACR, 1995OHT/YAM

vH 273387 35.0 288 1979KUD/KUDvH 294443 36.1 309 A 1970DYK, 1987STE/MAL

CBrF3 75-63-8 bromotrifluoromethanevH 276340 17.8 291 A 1987STE/MALvH 160267 17.7 252 A 1987STE/MALvH 165216 19.1 180 1979KUD/KUD



TABLE 5. Phase change enthalpies of C1 to C4 organic compoundsContinued

MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


CBrFO 753-56-0 carbonic bromide fluoridevH 197256 22.9 241 A 1987STE/MAL

CBrN 506-68-3 cyanogen bromidesubH 273308 45.24.2 MM 1954LOR/WOO, 1970COX/PILsubH 256308 47.0 GS 20BAX/BEZsubH 273313 45.9 288 1954LOR/WOO, 1984BOU/FRI

CBrN3O6 560-95-2 bromotrinitromethanevH 318335 47.8 326 A 1987STE/MAL, 1970CAR/ZIM

CBr2Cl2 594-18-3 dibromodichloromethanetrsH 5.43 258.8fusH 2.31 294.4 1995OHT/YAM

CBr2F2 75-61-6 dibromodifluoromethanevH 247297 26.1 282 A 1987STE/MAL, 1959MCD/SHR, 1979KUD/KUD,

1970DYKvH 156218 18.6 203 1948BAN/EME

CBr3F 353-54-8 tribromofluoromethanevH 315380 34.4 330 A 1987STE/MAL, 1948BAN/EME

CBr4 558-13-4 carbon tetrabromidetrsH 5.94 320fusH 3.95 363.2 1996DOM/HEA

subH(mono)

54.50.7 298 C 1984BIC/MIN

subH(mono)

295319 54.41.3 307 BG 1959BRA/DRU

subH(cubic)

321329 49.41.3 325 BG 1959BRA/DRU

subH(cubic)

48.3 320 1955HAR/SWI

vH 375463 48.3 390 1979KUD/KUDvH 369463 48.2 384 A 1987STE/MAL, 1947STU

CClFO 353-49-1 carbonic chloride fluoridevH 165211 22.7 196 A 1987STE/MAL, 1964FIS/BUCvH 157227 22.0 192 1948EME/WOO

CClF2NO 16847-30-6 difluorocarbamoyl chloridevH 189234 25.8 219 A 1987STE/MAL

CClF3 75-72-9 chlorotrifluoromethanevH 268302 16.0 283 A 1987STE/MALvH 133185 17.0 170 A 1987STE/MALvH 184246 15.7 231 A 1987STE/MALvH 243271 15.7 257 A 1987STE/MALvH 145192 16.8 177 A 1987STE/MAL, 1979KUD/KUDvH 124191 17.1 177 A 1947STUvH 134298 NA 1941RIE

CClF3O 22082-78-6 trifluoromethyl hypochloritevH 160226 21.2 211 A 1987STE/MALvH 142219 19.6 204 A 1987STE/MAL

CClF3O2 32755-26-3 peroxyhypochlorous acid, trifluoromethyl estervH 163296 23.4 281 A 1987STE/MAL




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


CClF3O3S 6069-31-4 fluorosulfuric acid, chlorodifluoromethyl estervH 227309 32.1 243 1999DYK/SVOvH 228310 34.6 243 A 1987STE/MAL, 1966DES/CAD

CClF3S 421-17-0 trifluoromethanesulfenyl chloridevH 247272 24.5 260 A 1987STE/MAL, 1999DYK/SVO

CClF4N 13880-71-2 difluorodifluorochloromethylaminevH 209277 26.6 262 A 1987STE/MAL

CClF4NO2S 19419-95-5 chlorotrifluoromethyl sulfamoyl fluoridevH 253288 28.8 273 A 1987STE/MAL, 1999DYK/SVO

CClF4NO12S4 53684-03-0 fluorosulfuric acid, bisfluorosulfonyloxyaminochloromethylene estervH 42.6 424 1975KIR/LAS

CClF7S 42179-04-4 chlorotetrafluoro trifluoromethyl sulfurvH 293353 25.9 323 1999DYK/SVO

CClN 506-77-4 cyanogen chloridesubH 196259 35.7 228 A 1947STU

vH 196286 32.2 271 1947STU

CCl2FNO 32751-02-3 dichlorocarbamic fluoridevH 40.7 1972DEM/SHR

CCl2F2 75-71-8 dichlorodifluoromethanevH 282345 20.0 297 A 1987STE/MALvH 173244 21.4 229 A 1987STE/MALvH 173240 21.6 225 A 1987STE/MALvH 236285 20.4 270 A 1987STE/MALvH 341385 20.5 356 A 1987STE/MALvH 172279 22.9 187 1979KUD/KUDvH 154243 21.5 228 1947STUvH 20.4 243 1931BUF/FLE

CCl2F3N 24618-60-8 N,N-difluoro-1,1-dichloro-1-fluoromethylaminevH 209277 27.0 262 I 1970ZAB/SHR

CCl2F3N 13880-73-4 N,N-dichloro-1,1,1-trifluoromethylaminevH 226291 25.8 276 A 1987STE/MAL

CCl2F3N 33757-11-8 N,1-dichloro-N,1,1-trifluoromethylaminevH 226291 26.4 258 1971SWI/ZAB

CCl2F3NS 10564-47-3 trifluoromethylimidosulfurous dichloridevH 284344 35.4 298 1999DYK/SVOvH 283362 33.7 298 A 1987STE/MAL

CCl2F3P 421-58-9 trifluoromethyldichlorophosphinevH 208276 29.2 260 1964PET/BUR

CCl2F3PS 18799-78-5 dichlorotrifluoromethylthio phosphinevH 293363 31.7 308 A 1987STE/MAL, 1999DYK/SVO, 1960EME/PUG

CCl2O 75-44-5 phosgenefusH (I) 5.74 145.4fusH (II) 5.59 142.1fusH (III) 4.73 139.2 1960GIA/OTTfusH 5.73 145.3 1948GIA/JON




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


vH 280341 24.5 295 A 1987STE/MALvH 240281 25.7 266 A 1987STE/MALvH 338410 24.5 353 A 1987STE/MALvH 406455 24.4 421 A 1987STE/MALvH 215248 27.0 233 1948GIA/JONvH 180273 25.8 258 1947STU

CCl3F 75-69-4 trichlorofluoromethanefusH 6.9 162.7 1996DOM/HEA

vH 213301 28.5 228 A 1987STE/MALvH 213249 28.2 234 A 1987STE/MALvH 295363 25.6 310 A 1987STE/MALvH 357429 24.7 372 A 1987STE/MALvH 424468 25.1 439 A 1987STE/MALvH 237293 27.3 251 1979KUD/KUDvH 237293 27.1 276 1941OSB/GARvH 25.2 290 C 1941OSB/GARvH 244334 26.4 259 1940BEN/MCH

CCl3F2N 24708-52-9 N,N-difluoro-1,1,1-trichloromethylaminevH 252325 33.4 267 I 1987STE/MAL, 1970ZAB/SHR

CCl3F2N 33757-10-7 N,1,1-trichloro-N,1-difluoromethylaminevH 273319 27.8 296 1971SWI/ZAB

CCl3F2P 1112-03-4 difluorotrichloromethyl phosphinesubH 264283 36.8 274 1987STE/MAL

vH 289313 32.5 301 A 1987STE/MAL

CCl3F4P 1184-80-1 trichloromethyl tetrafluorophosphoranevH 257300 10.4 1965NIX

CCl3NO 3711-49-7 trichloronitrosomethanevH 253333 32.4 268 A 1987STE/MAL

CCl3NO2 76-06-2 trichloronitromethanevH 273333 39.3 288 A 1987STE/MALvH 301449 38.5 316 A 1987STE/MAL, 1970DYK

247385 40.0 262 1947STU

CCl4 56-23-5 carbon tetrachloridetrsH 4.6 224.6 1996DOM/HEAfusH 2.69 249 1996DOM/HEA

subH 43.3 226 B 1963BONsubH 209225 38.8 217 1960JON, 1948NIT/SEKsubH 227248 37.9 1948NIT/SEK

vH 349416 30.4 364 A 1987STE/MALvH 412497 29.2 427 A 1987STE/MALvH 494555 30.6 509 A 1987STE/MALvH 32.4 298 C 1980MAJ/SVAvH 262349 33.7 277 A, EB 1987STE/MAL, 1972BOU/AIMvH 293351 32.3 308 1959HIL/MCDvH 313338 31.7 325 1953BAR/BRO

CCl4O2S 2547-61-7 trichloromethanesulfonyl chloridetrsH 7.1 227.4




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


fusH 7.46 418.5 1994DOU/FEU

CFIO 1495-48-3 carbonyl fluoride iodidevH 230292 26.1 277 A 1987STE/MAL

CFN 1495-50-7 cyanogen fluoridesubH 147191 28.9 176 A 1987STE/MAL, 1964FAW/LIPsubH 139192 24.4 166 1947STUsubH 133203 29.3 168 1931COS

vH 201227 22.4 214 A 1987STE/MAL, 1964FAW/LIP, 1970DYK

CFNO3S 1495-51-8 sulfuryl fluoride isocyanatevH 294335 36.5 309 A 1987STE/MAL, 1999DYK/SVO

CFNO6S2 27931-74-4 pyrosulfuryl fluoride isocyanatevH 330405 40.9 345 A 1987STE/MAL, 1999DYK/SVO

CFN3O6 1840-42-2 fluorotrinitromethanevH 274358 34.2 289 A, T 1987STE/MAL, 1966ZIM/ROB

CF2N2 7127-18-6 difluorocyanamidevH 179198 20.6 189 1987STE/MAL, 1966MEY/FRA

CF2N2OS 19073-57-5 cyanoimidosulfuryl fluoridevH 262354 37.2 277 A 1987STE/MAL, 1999DYK/SVO

CF2N2O4 1185-11-1 difluorodinitromethanevH 283310 41.4 296 A 1987STE/MAL, 1973PEP/LEB

CF2N2S 14453-41-9 N-cyano-S,S-difluorosulfiliminevH 271320 44.1 286 A 1987STE/MAL, 1999DYK/SVO

CF2O 353-50-4 carbonyl fluoridefusH 6.7 161.9 1968PAC/REN

subH 130159 23.2 145 1987STE/MAL, 1968PAC/REN

vH 159189 20.0 174 A 1987STE/MAL

CF2O4S 7519-54-2 fluoroformyl fluorosulfatevH 250296 27.3 281 A 1987STE/MAL, 1999DYK/SVO

CF2S 420-32-6 thiocarbonyl fluoridevH 133211 19.2 196 A 1987STE/MAL, 1970DYKvH 178211 17.4 196 A 1987STE/MAL, 1999DYK/SVO, 1962DOW

CF3I 2314-97-8 iodotrifluoromethanevH 188296 22.5 281 A 1987STE/MAL, 1970DYK, 1948BAN/EME

CF3NO 2368-32-3 difluoroamino carbonyl fluoridevH 143217 21.6 202 A, MM 1987STE/MAL, 1965FRA/SHR

CF3NO 334-99-6 trifluoronitrosomethanevH 141174 17.1 159 A 1987STE/MAL

CF3NOS 3855-41-2 S,S-difluoro-N-fluoroformyl-sulfiminevH 220323 37.3 235 A 1987STE/MAL, 1999DYK/SVO

CF3NOS 24892-54-4 trifluoromethyl thionitritevH 196215 25.8 205 T 1969MAS

CF3NOS 10564-49-5 N-sulfinyl-trifluoromethylamine




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


vH 239289 27.0 274 A 1987STE/MAL, 1999DYK/SVO

CF3NO2 335-02-4 trifluoronitromethanevH 238243 21.6 240 A 1987STE/MAL

CF3NO4 50311-48-3 trifluoromethyl peroxynitratevH 193247 24.8 232 A 1987STE/MAL

CF3NO6S2 19252-48-3 N-fluoroformyl-N,O-bisfluorosulfonyl hydroxylaminevH 325392 36.3 340 A 1987STE/MAL, 1999DYK/SVO

CF4 75-73-0 carbon tetrafluoridetrsH 1.71 76.27fusH 0.71 89.56 1996DOM/HEA

subH 7690 14.7 83 1987STE/MAL, 70GEN/DUVsubH 7076 16.8 73 1987STE/MAL, 1970GEN/DUVsubH 8689 14.7 88 1967SIM/KNOsubH 17.0 76 1963BONsubH 8086 14.0 83 A 1933MEN/MOH

vH 195227 12.1 212 A 1987STE/MALvH 89163 12.3 148 A 1987STE/MALvH 160197 11.9 182 A 1987STE/MALvH 116146 12.4 131 1969SMI/PACvH 93146 12.8 131 1933MEN/MOH, 1987STE/MAL

CF4N2O 815-10-1 fluorotrifluoromethyl diimidoxidevH 233267 27.7 252 A 1987STE/MAL

CF4N2O3S2 25523-80-2 carbonylbisimidosulfuryl fluoridevH 316331 41.3 323 A 1987STE/MAL, 1999DYK/SVO

CF4O 373-91-1 hypofluorous acid trifluoromethyl estervH 153194 15.5 179 A 1987STE/MAL, 1948KEL/CAD

Note: The table in Ref. 1948KEL/CAD gives the temperatures in C; however, all of the equations and graphs in thearticle suggest that the temperature should be in Kelvin. We have assumed that the tabulated temperatures are inKelvin; the results closely correspond to the entry in Ref. 1987STE/MAL.

CF4OS 812-12-4 trifluoromethyl sulfinyl fluoridevH 204271 22.7 256 A, I 1987STE/MAL, 1968RAT/SHR, 1970DYK, 1999DYK/

SVO

CF4O2 34511-13-2 hydroperoxyfluoric acid trifluoromethyl estervH 156203 18.7 188 A 1987STE/MAL

CF4O2S 335-05-7 trifluoromethane sulfonyl fluoridevH 226249 23.4 237 A 1987STE/MAL, 1999DYK/SVO

CF4O3S 926-08-9 trifluoromethyl fluorosulfonatevH 194269 25.6 231 1960VAN/CAD

CF4O4S 13990-10-8 trifluoromethylperoxyfluorosulfonatevH 233286 27.7 259 1960VAN/CAD

CF4O5S2 21595-44-8 fluorosulfonic acid trifluoromethane sulfonic acid anhydridevH 308338 32.9 323 A 1987STE/MAL, 1999DYK/SVO

CF4O6S2 6123-47-3 trifluoromethyl fluorodisulfatevH 292351 34.4 321 1960VAN/CAD

CF5N 335-01-3 pentafluoromethyl amine




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


subH 128141 18.6 135 1987STE/MAL, 1951COA/HAR

CF5NO 4217-93-0 pentafluoromethoxyaminevH 167210 18.5 195 A 1987STE/MAL, 1965SHR/DUN

CF5OPS 52752-66-6 phosphorothionic difluoride, S-trifluoromethyl estervH 293353 23.1 323 1999DYK/SVO

CF5OPS 52752-66-6 trifluoromethylthiosphoryl difluoridevH 23.0 1974SPE/SHR

CF5O3P 39125-42-3 trifluoromethoxyphosphoryl difluoridevH 225264 27.4 245 1973BER/DES

CF5O3P 39125-42-3 difluoroperoxyphosphoric acid trifluoromethyl estervH 241280 32.0 265 A 1987STE/MAL, 1973BER/DES

CF5PS 52752-65-5 trifluoromethyl thiodifluorophosphinevH 24.3 1974SPE/SHR

CF6N2O2S2 20094-83-1 N,N-difluoromethylenebis imidosulfuryl fluoridevH 283308 36.0 295 1968GLE/VON

CF6N2S2 17686-45-2 difluoromethane bisS,S-difluorosulfiliminevH 230313 36.0 245 A 1987STE/MAL, 1999DYK/SVO

CF6PS 52752-65-5 difluorotrifluoromethylthiophosphinevH 293353 22.3 323 1999DYK/SVO

CF8OS 1873-23-0 pentafluoro trifluoromethoxy sulfurvH 217262 24.4 247 A 1987STE/MAL, 1964DUN/CAD

CF8S 373-80-8 trifluoropentafluorothiomethanevH 223252 20.2 253 I 2001KUL/DESvH 205262 23.8 247 A 1987STE/MAL, 1999DYK/SVO

CF9NOS 1840-45-5 tetrafluorodifluoroaminotrifluoromethoxy sulfurvH 257298 28.7 272 A 1987STE/MAL, 1964DUN/CAD2

CF10O5S2 60672-59-5 -carbonodiperoxatodecafluorodisulfurvH 38.1 1976HOP/DES

CIN 506-78-5 cyanogen iodidesubH 337426 59.9 352 GSM 1987STE/MAL, 1943KET/KRUsubH 298414 58.6 356 A 1947STUsubH 337426 59.80.4 GSM 1943KET/KRU, 1970COX/PILsubH 278374 58.3 326 1933YOS/STO

vapH 419426 40.0 423 A 1987STE/MAL

CN4O8 509-14-8 tetranitromethanesubH 255286 47.4 271 1987STE/MAL, 1941SEK/NIT

vH 286373 43.1 301 A 1987STE/MALvH 313373 42.9 328 A 1987STE/MAL, 1984BOU/FRI, 1952EDWvH 273313 46.6 288 1987STE/MAL, 1984BOU/FRI, 1949NIC

CO 630-08-0 carbon monoxidesubH 5461 7.6 58 1987STE/MALsubH 5168 8.1 60 A 1947STUsubH 5768 7.9 62 A 1931CRO/BIJ




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


vH 68108 6.0 93 A 1987STE/MALvH 6983 6.0 81 1932CLA/GIAvH 6.0 81 C 1932CLA/GIA

COS 463-58-1 carbonyl sulfidevH 161284 20.4 176 1999DYK/SVOvH 284379 18.3 299 1999DYK/SVOvH 140224 19.5 209 A 1987STE/MALvH 19.00.1 214 1939FRA/CLUvH 162224 19.5 209 1937KEM/GIA

CO2 124-38-9 carbon dioxidesubH 198216 26.1 207 A 1987STE/MALsubH 70102 27.20.4 LE 1974BRY/CAZsubH 179198 25.9 188 1956AMBsubH 139195 26.3 167 A 1947STUsubH 154196 25.2 195 1937GIA/EGA

vH 273304 16.7 288 A 1987STE/MALvH 216273 16.4 258 A 1987STE/MALvH 267303 16.5 282 1972BOU/AIM

CS2 75-15-0 carbon disulfidevH 255354 28.7 270 1999DYK/SVOvH 354552 27.1 369 1999DYK/SVOvH 260353 28.5 275 A 1987STE/MALvH 338408 27.4 353 A 1987STE/MALvH 388497 27.0 403 A 1987STE/MALvH 490533 28.7 505 A 1987STE/MALvH 255318 28.7 270 EB 1972BOU/AIM, 1987STE/MALvH 277353 28.1 292 EB 1962WAD/SMIvH 28.10.1 282 C 1962WAD/SMIvH 27.50.1 298 C 1962WAD/SMIvH 26.70.1 319 C 1962WAD/SMIvH 27.7 298 1961GOO/LACvH 303358 27.6 318 1946THO

CHBrF2 1511-62-2 bromodifluoromethanevH 194259 24.0 244 A 1987STE/MALvH 194288 24.7 209 1979KUD/KUD

CHBr3 75-25-2 tribromomethanefusH 11.09 281.5 1987KAF/DOR

vH 46.10.1 298 C 1972LAY/WADvH 320412 42.3 335 EB 1972BOU/AIM, 1979KUD/KUDvH 303373 44.0 318 1941KIR/SIT, 1984BOU/FRI

CHClF2 75-45-6 chlorodifluoromethanetrsH 0.07 59fusH 4.12 115.7 1996DOM/HEA

vH 275327 20.0 290 A 1987STE/MALvH 170233 21.3 218 A 1987STE/MALvH 230275 20.4 260 A 1987STE/MALvH 324366 20.1 339 A 1987STE/MALvH 194310 21.8 209 1979KUD/KUDvH 229236 21.0 232 1964KLEvH 20.2 232 C 1957NEI/WHI




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


CHCl2F 75-43-4 dichlorofluoromethanevH 225282 26.1 267 A 1987STE/MALvH 279344 25.3 294 A 1987STE/MALvH 341399 24.2 356 A 1987STE/MALvH 397450 24.1 412 A 1987STE/MALvH 229236 U 20.9 233 1964KLEvH 181282 26.2 267 1947STUvH 244317 36.7 259 1940BEN/MCH

CHCl2FO3S 42016-50-2 fluorosulfuric acid, dichloromethyl estervH 275293 36.2 284 A 1987STE/MAL, 1999DYK/SVO

CHCl3 67-66-3 chloroformfusH 8.8 209.6 1991ACR

vH 306427 30.8 321 1995CHE/WANvH 227269 31.8 254 A 1987STE/MALvH 333416 30.4 348 A 1987STE/MALvH 410481 28.9 425 A 1987STE/MALvH 479523 30.1 494 A 1987STE/MALvH 31.1 298 C 1980MAJ/SVAvH 260333 32.5 275 EB 1972BOU/AIMvH 215334 35.0 230 1947STUvH 308333 30.9 320 1938SCT/RAY

CHFI2 1493-01-2 diiodofluoromethanevH 299332 32.9 314 A 1987STE/MAL, 1979KUD/KUD, 1970DYK

CHFN2O4 7182-87-8 fluorodinitromethanevH 298338 43.6 313 A 1987STE/MAL

CHFO 1493-02-3 formyl fluoridevH 178235 24.4 220 A 1987STE/MAL, 1964FIS/BUC, 1970DYK

CHF2I 1493-03-4 difluoroiodomethanevH 227287 26.0 272 A 1987STE/MAL, 1979KUD/KUD, 1970DYK

CHF3 75-46-7 trifluoromethanefusH 4.06 118 1996DOM/HEA

subH 89118 25.6 103 1987STE/MAL

vH 138190 18.1 175 A 1987STE/MALvH 198298 16.8 213 A 1987STE/MALvH 146192 18.0 177 1962VAL/BRO

CHF3O2 16156-36-8 trifluoromethyl hydroperoxidevH 248285 30.9 270 A 1987STE/MAL

CHF3O3S 1493-13-6 trifluoromethylsulfonic acidvH 354435 47.7 369 A 1987STE/MAL, 1999DYK/SVO

CHF3S 1493-15-8 trifluoromethanethiolfusH 4.93 116 1996DOM/HEA

vH 167236 21.8 183 1999DYK/SVOvH 167236 21.0 221 A 1987STE/MAL, 1999DYK/SVO

CHF7S 420-67-7 difluoromethyl sulfur pentafluoridevH 221292 27.5 237 1999DYK/SVOvH 221293 25.6 278 A 1987STE/MAL, 1999DYK/SVO




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


CHI3 75-47-8 iodoformsubH 308365 69.9 323 1943NIT/SEK

CHN 74-90-8 hydrogen cyanidesubH 236259 35.6 248 1987STE/MALsubH 202254 37.6 228 A 1947STU

vH 259299 28.1 274 A 1987STE/MALvH 298457 27.8 313 A 1987STE/MALvH 257315 28.1 272 1975IWA/DATvH 259294 28.0 277 1934LEW/SCHvH 257319 28.1 272 1926SIN/HARvH 265300 27.8 282 1926PER/PORvH 256319 27.2 303 MM 1926SIN/HAR

CDN 3017-23-0 deuterium cyanidevH 182282 26.2 267 1947STUvH 265293 27.6 279 1934LEW/SCH

CHNO 420-05-3 cyanic acidvH 233268 30.7 253 A 1987STE/MALvH 197267 NA 1938LIN

CHNS 463-56-9 thiocyanic acidvH 278396 28.0 293 A 1987STE/MAL

CHN3O6 517-25-9 trinitromethanesubH 45.22.1 298 1999MIR/VORsubH 54.84.2 1970BON/CATsubH 46.70.4 1967MIR/LEB, 1970COX/PIL, 1977PED/RYL

vH 290317 32.6 303 A 1987STE/MAL, 1967MIR/LEB

CH2BrCl 74-95-7 bromochloromethanevH 226341 42.0 241 A 1987STE/MALvH 289341 33.5 304 1959MCD/SHR, 1979KUD/KUD

CH2Br2 74-95-3 dibromomethanevH 273373 36.5 288 C 1979KUD/KUDvH 37.00.1 298 A, E 1972LAY/WADvH 290409 37.2 305 1987STE/MAL, 1956MAN, 1970DYKvH 238371 37.8 253 1947STU

CH2ClF 593-70-4 chlorofluoromethanevH 140264 23.3 249 A 1987STE/MAL, 1970DYK

CH2Cl2 75-09-2 dichloromethanefusH 6.16 178.2 1996DOM/HEA

vH 30.60.1 298 C 1989AN/HUvH 311383 29.0 326 A 1987STE/MALvH 28.8 298 C 1980MAJ/SVAvH 264311 30.3 279 EB 1972BOU/AIMvH 303313 29.2 308 1960MUE/IGNvH 233313 30.2 248 1948GAN/JUNvH NA 1946DZUvH 186312 29.4 1927PER

CH2F2 75-10-5 difluoromethanefusH 4.36 136.4 1996LUE/MAG




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


vH 149245 20.6 230 1987KAN/OIvH 256321 19.9 271 A 1987STE/MALvH 191222 21.2 207 A 1987STE/MALvH 191258 20.3 243 A 1987STE/MALvH 316351 20.3 331 A 1987STE/MALvH 191221 21.2 206 1968MAL/MEUvH 191242 20.6 227 1968MAL/MEU

CH2F3NS 1512-33-0 1,1,1-trifluoromethanesulfenamidevH 218291 34.1 276 A 1987STE/MAL, 1999DYK/SVO, 1960EME/NAB

CH2I2 75-11-6 diiodomethanefusH 12.05 279.2 1987KAF/DOR

vH 45.6 298 GC 1994CAR/LAYvH 49.0 298 C 1987FUC/CHAvH 293455 48.8 307 1979KUD/KUDvH 356505 45.4 371 A 1987STE/MAL, 1970DYK

CH2N2 420-04-2 cyanamidefusH 8.76 317.2 1991ACR

subH 227289 75.9 290 TE,ME 1983DEW/VANsubH 75.2 298 1983DEW/VAN

CH2N4 288-94-8 tetrazolefusH 17.7 432.1 1990KOZ/SIM3

subH 88.16 353 C 1993KAB/KOZsubH 87.81.4 369 ME 1993KAB/KOZsubH 333404 88.01.6 ME 1990KOZ/SIMsubH 333363 97.54.2 348 ME 1951MCE/RIG, 1970COX/PIL

CH2O 50-00-0 formaldehydefusH 7.53 155 1998VAS/LEB

vH 184251 24.3 236 A 1987STE/MALvH 173251 24.2 236 1935SPE/WIL, 1987STE/MAL

CH2O2 64-18-6 formic acidsubH 268281 60.5 275 1987STE/MALsubH 203218 62.11 213 TE,ME 1978CAL/CALsubH 265268 60.7 266 1930COO, 1960JONsubH 253275 60.1 264 A 1947STU

vH 300392 35.2 315 EB 1987AMB/GHI3vH 283384 36.0 298 A 1987STE/MALvH monomer 20.10.1 298 C 1970KON/WADvH 46.30.5 298 C 1970KON/WADvH 310374 35.2 325 1949DRE/SHR, 1949DRE/MARvH 19.9 298 1941STO/FISvH 29.6 303 1934CAM/CAMvH 273373 20.3 315 1930COOvH 273373 20.9 338 1930COOvH 20.4 315 C 1930COOvH 21.1 338 C 1930COOvH 273307 36.8 288 1994KAHvH 295374 47.7 374 1883KAH

CH2O22 14523-98-9 formic acid dimer




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


subH 203218 64.11 213 TE,ME 1978CAL/CAL

CH3Br 74-83-9 methyl bromidetrsH 0.47 173.8fusH 5.98 179.5 1996DOM/HEA, 1987KAF/DOR

vH 223278 25.8 238 1979KUD/KUDvH 201296 24.6 281 A, E 1987STE/MAL, 1961LI/ROSvH 203277 25.2 262 1947BEE/JUNvH 203278 25.3 263 1938EGA/KEM

CH3Cl 74-87-31 methyl chloridefusH 6.42 174.5 1996DOM/HEA

subH 130172 31.60.1 151 1995BAH/DUPsubH 28.0 B 1940MES/AST

vH 247310 22.0 262 A 1987STE/MALvH 368416 21.8 383 A 1987STE/MALvH 308373 21.0 323 A 1987STE/MALvH 198278 22.0 263 1948GAN/JUNvH 183250 22.7 235 1947BEE/JUNvH 191249 23.5 206 1946THOvH 192249 22.6 234 1940MES/ASTvH 20.1 293 C 1926YAT

CH3ClFOP 753-71-9 methylphosphonyl chlorofluoridefusH 11.85 250.7 AC 1964FUR/REI

CH3Cl2P 676-83-5 dichloromethyl phosphinevH 229297 35.5 282 A 1987STE/MAL, 1963HOL/WAG

CH3Cl2OP 676-97-1 methylphosphonic dichloridefusH 18.08 306.1 1964FUR/REI

subH 62.3 1970COX/PIL, 1955NEA/WIL

CH3F 593-53-3 methyl fluoridevH 205242 16.9 227 A 1987STE/MALvH 240288 16.9 273 A 1987STE/MALvH 133211 17.9 172 1983OI/SHUvH 141208 17.1 193 A, E 1987STE/MAL, 1961LI/ROS, 1970DYKvH 165217 16.4 202 1987STE/MAL, 1948MIC/WAS, 1984BOU/FRIvH 170197 17.7 183 A 1987STE/MAL, 19MOL/BAT, 1984BOU/FRI

CH3F2N 753-58-2 N,N-difluoromethylaminevH 203257 23.5 242 A 1987STE/MALvH 22.9 257 1960FRA

CH3F2NS 758-20-3 methylimidosulfurous difluoridevH 194258 28.7 226 1999DYK/SVOvH 194258 28.6 243 A 1987STE/MAL, 1999DYK/SVO

CH3F2P 753-59-3 difluoromethyl phosphinevH 174236 23.4 221 A 1987STE/MAL

CH3F2OP 676-99-3 methylphosphonyl difluoridefusH 11.88 236.3 1964FUR/REI

CH3F2OPS 25237-37-0 difluorothiophosphoric, S-methyl estervH 236298 31.2 251 A 1987STE/MAL, 1999DYK/SVO




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


CH3F2PS2 21348-13-0 difluorodithiophosphoric acid, methyl estervH 253298 39.0 268 A 1987STE/MAL, 1999DYK/SVO

CH3F4NP2S2 25741-62-2 N,N-bisdifluorothiophosphoral methylaminevH 273325 38.7 288 A 1987STE/MAL, 1999DYK/SVO

CH3I 74-88-4 methyl iodidefusH 9.12 206.8 1982WRE/VIK

subH 176227 40.20.4 191 VG 1982WRE/VIKsubH U 69.9 1943NIT/SEK, 1960JON

vH 228337 30.4 243 A 1987STE/MALvH 315502 26.5 330 A 1987STE/MALvH 208227 31.1 217 1982WRE/VIKvH 259314 29.2 274 EB 1972BOU/AIM, 1979KUD/KUDvH 218315 30.4 233 1947STUvH 273307 28.2 288 1936EWE

CH3NO 75-12-7 formamidefusH 7.98 275.7 1996DOM/HEAfusH 8.67 275.6 1983DEW/DEK

subH 251273 72.4 264 TE,ME 1983DEW/VANsubH 71.7 298 1983DEW/VANsubH 71.7 276 1979DAA/VAN

vH 293377 70.8 308 A 1987STE/MALvH 415466 61.2 430 A 1987STE/MALvH 60.2 298 A 1985BAR/CAS, 1985MAJ/SVOvH 343483 64.0 358 1947STU

CH3NOS 4291-05-8 N-sulfinyl methanaminevH 252277 31.8 264 A 1987STE/MAL, 1999DYK/SVO

CH3NO2 624-91-9 methyl nitritevH 218273 22.1 258 A 1987STE/MALvH 154225 26.2 190 1982ROOvH 22.60.2 1958GRA/PRA

CH3NO2 75-52-2 nitromethanefusH 9.7 244.8 1996DOM/HEA

vH 38.50.4 298 1999MIR/VOR2vH 313353 37.2 298 CGC 1995CHI/HOSvH 405476 35.2 420 A 1987STE/MAL, 1967BER/WESvH 328410 36.8 343 A 1987STE/MAL, 1954MCC/SCOvH 37.20.1 318 C 1954MCC/SCOvH 36.30.1 335 C 1954MCC/SCOvH 35.20.1 353 C 1954MCC/SCOvH 34.00.1 374 C 1954MCC/SCOvH 283373 38.00.4 298 ZG 1949HOL/DORvH 38.30.1 298 C 1947JON/GIA

CH3NO3 598-58-3 methyl nitratefusH 8.24 190.2 1996DOM/HEA

vH 273303 34.8 288 A 1987STE/MAL

CH3N5 4418-61-5 5-aminotetrazolesubH 383443 112.61.2 ME 1990KOZ/SIM




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


CH4 74-82-8 methanesubH 5391 9.7 72 1987STE/MALsubH 5490 9.2 72 1963BON, 1955ARM/BRIsubH 7989 10.0 84 1960JONsubH 4878 9.7 63 A,MS 1951TIC/LOSsubH 6788 9.62 77 A 1947STU

vH 90120 8.6 105 A 1987STE/MALvH 115149 8.4 134 A 1987STE/MALvH 148189 8.7 174 A 1987STE/MALvH 91127 8.6 112 1972PRY/GOO, 1984BOU/FRIvH 91190 8.5 175 1972PRY/GOOvH 8.1 137 1971WIL/ZWOvH 100190 8.6 175 1970AMB/COUvH 8.2 112 C 1961HES/WHIvH 7.5 130 C 1961HES/WHIvH 5.9 160 C 1961HES/WHIvH 4.0 180 C 1961HES/WHIvH 109189 8.5 149 1961HES/WHIvH 8.50.1 99 1939FRA/CLUvH 92110 8.6 101 1921STO/HEN, 1984BOU/FRI

CH4F2NPS 31411-30-0 difluorothiophosphoric acid, N-methylamidevH 273325 39.1 288 A 1987STE/MAL, 1999DYK/SVO

CH4N2 12211-52-8 ammonium cyanidevH 222305 47.1 237 1947STU

CH4N2 26981-93-1 methyl diazenevH 195236 27.5 221 A 1987STE/MAL

CH4N2O 57-13-6 ureafusH 14.6 407.2 DSC 1999RAI/RAIfusH 14.6 406.7 DSC 1998RAI/RAIfusH 13.6 405.2 DSC 1998JAM/PALfusH 15.03 407.9 DSC 1995FER/DELfusH 12.93 408.1 1990KAB/MIR2fusH 13.9 405.8 1986KOZ/DAL

subH 358402 95.50.3 298 GS 2006EME/KABsubH 329403 94.62.2 370 ME 2003ZAI/KABsubH 329403 95.12.2 350 ME 2003ZAI/KABsubH 94.60.5 350 C 2003ZAI/KABsubH 90.9 381 1987FER/DEL2subH 345368 87.7 357 1987STE/MALsubH 338362 96.9 351 TE,ME 1983DEW/VANsubH 98.6 298 1983DEW/VANsubH 95.4 361 1978TRI/VOOsubH 345368 87.92.1 356 1956SUZ/ONI, 1960JON, 1970COX/PILsubH 88.2 357 1953BRA/CLE2, 1983DEW/VAN

CH4N2S 62-56-5 thioureatrsH 0.026 169trsH 0.113 200 AC 1993IGA/LOPfusH 15.64 444.7 2000DEL/JOZtrsH 0.026 169trsH 0.113 200 AC 1993IGA/LOPfusH 12.6 452.2 1994DOU/FUE




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


fusH 12.55 452.2 1994KIM/LEE

subH 112.02 298 ME 2000DEL/JOZsubH 1092.0 408 TE 1994FER/MARsubH 1113.0 298 1994FER/MARsubH 378396 103.90.3 387 ME 1994TOR/HERsubH 368395 106.6 384 TE,ME 1983DEW/VANsubH 107.6 298 1983DEW/VANsubH 1121.5 298 C 1982TOR/SABsubH 93.710 1975BAG/AND

CH4N2O2 1111-78-0 ammonium carbamatevH 247331 54.1 262 1947STU

CH4N4O2 556-88-7 nitroguanidinesubH 402473 142.72.0 298 ME 1978CUN/PAL

CH4N4O4 14168-44-6 N,N-dinitro-diaminomethanefusH 35.85 371 1987OYU/BRI

CH4O 67-56-1 methanoltrsH 0.59 161.1fusH 3.18 175.3 1996DOM/HEA

vH 298333 38.0 298 2004NAS/ZIMvH 34.3 1999FATvH 175273 39.2 258 A 1987STE/MALvH 338487 36.9 353 A 1987STE/MALvH 188228 43.7 213 A 1987STE/MALvH 224290 38.9 275 A 1987STE/MALvH 285345 38.3 300 A 1987STE/MALvH 335376 37.0 350 A 1987STE/MALvH 373458 36.1 388 A 1987STE/MALvH 453513 35.1 468 A 1987STE/MALvH 32.7 373 C 1986YER/WORvH 28.1 423 C 1986YER/WORvH 20.6 473 C 1986YER/WORvH 7.4 510 C 1986YER/WORvH 316336 37.5 331 EB 1984CER/BOUvH 243303 37.8 298 1983SCH/STRvH 288337 38.3 303 1974GIB/CRE, 1984BOU/FRIvH 337383 37.0 352 1973WIL/ZWOvH 37.40.1 298 C 1973SVO/VESvH 36.70.1 313 C 1973SVO/VESvH 36.20.1 323 C 1973SVO/VESvH 35.60.1 333 C 1973SVO/VESvH 35.30.1 338 C 1973SVO/VESvH 34.70.1 343 C 1973SVO/VESvH 35.20.1 338 C 1973COU/LEEvH 35.60.1 331 C 1973COU/LEEvH 36.20.1 321 C 1973COU/LEEvH 37.00.1 306 C 1973COU/LEEvH 275336 38.7 290 EB 1972BOU/AIM, 1987STE/MALvH 37.430.02 298 C 1971POL/BENvH 288357 38.3 303 EB 1970AMB/SPRvH 353483 36.3 368 1967HIR/SUDvH 37.30.1 298 C 1966WADvH 37.70.1 298 C 1963MCC/LAI




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


vH 278323 38.4 293 1960KLY/MIS

CH4O2 3031-73-0 methyl hydroperoxidevH 253313 37.7 268 A 1987STE/MAL, 1951EGE/EMT

CH4O3S 75-75-2 methanesulfonic acidvH 395440 73.9 410 A 1987STE/MAL, 1999DYK/SVO

CH4S 74-93-1 methyl mercaptantrsH 2.2 137.6fusH 5.9 150.2 1996DOM/HEA

vH 208298 27.2 223 1999DYK/SVOvH 267359 25.2 359 A 1987STE/MALvH 221283 25.7 268 A 1987STE/MALvH 345424 23.7 360 A 1987STE/MALvH 414470 24.2 429 A 1987STE/MALvH 23.8 298 1971WIL/ZWOvH 222279 25.8 264 1987STE/MAL, 1942RUS/OSB

CH5N 74-89-5 methylaminefusH 6.13 179.7 1996DOM/HEA

vH 319381 24.8 334 A 1987STE/MALvH 373430 23.5 388 A 1987STE/MALvH 263329 26.1 278 A 1987STE/MALvH 223273 27.2 258 A 1987STE/MAL, 1970DYKvH 190267 27.4 252 1937AST/SIL, 1984BOU/FRI

CH5NO 593-77-1 N-methylhydroxylaminesubH 273308 56.6 288 1987STE/MAL, 1957BIS/PAR

vH 293338 49.7 308 A 1987STE/MAL, 1970DYKvH 313338 49.3 325 A 1987STE/MAL, 1957BIS/PAR, 1984BOU/FRI

CH5NO 67-62-9 O-methylhydroxylaminevH 228322 36.9 243 A 1987STE/MALvH 210321 38.0 225 1957BIS/PAR, 1984BOU/FRI

CH5N3O 758-19-0 1-methyl-1-nitrosohydrazinesubH 79.50.4 298 1998LEB/CHI

CH5N3S 79-19-6 thiosemicarbazidesubH 125.81.5 298 C 1982TOR/SAB

CH5O3P 993-13-5 methylphosphonic acidsubH 48.14.2 1955NEA/WIL, 1970COX/PIL

CH6ClN 593-51-1 methylamine hydrochloridevH 518593 114.5 533 A 1987STE/MAL

CH6N2 60-33-4 methylhydrazinefusH 10.42 220.8 1996DOM/HEA

vH 274299 41.8 286 A 1987STE/MAL, 1951AST/FIN

CH6N4S 2231-57-4 thiocarbohydrazidesubH 152.13.0 298 C 1982TOR/SAB

C2BrCl2F3O4 38217-36-6 perchloric acid, 1,2,2-trifluoro-1-chloro-2-bromoethyl estervH 273294 42.5 283 A 1987STE/MAL, 1973SCH/PIL




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


C2BrCl3O 34069-94-8 trichloroacetyl bromidevH 265416 42.6 280 A 1987STE/MAL, 1947STU

C2BrCl5 79504-02-2 bromopentachloroethanesubH 383433 44.4 398 1987STE/MAL, 1949HIG/END

C2BrF3 598-73-2 bromotrifluoroethylenevH 260340 25.0 275 A 1987STE/MAL

C2BrF5O3S 757-02-8 2-bromotetrafluoroethyl fluorosulfatevH 273298 33.2 285 1963GIL/CAD

C2BrF9S 63011-81-4 pentafluoro1-bromo-1,2,2,2-tetrafluoroethyl sulfurvH 294330 30.7 309 A 1987STE/MAL, 1999DYK/SVO

C2Br2ClF3 354-51-8 2-chloro-1,2-dibromo-1,1,2-trifluoroethanevH 343428 31.4 358 A 1987STE/MALvH 35.00.1 298 C 1981MAJ/SVOvH 34.20.1 313 C 1981MAJ/SVOvH 33.50.1 328 C 1981MAJ/SVOvH 32.60.1 343 C 1981MAJ/SVOvH 31.60.1 358 C 1981MAJ/SVO

C2Br2Cl4 630-25-1 1,2-dibromotetrachloroethanesubH 383453 52.5 398 1987STE/MAL, 1949HIG/ENDsubH 323423 56.7 373 A 1935CAR/DIC

C2Br2F4 124-73-2 1,2-dibromotetrafluoroethanefusH 7.04 162.8 1991ACR

vH 283357 28.5 298 A 1987STE/MALvH 354443 26.9 369 A 1987STE/MALvH 440488 27.1 455 A 1987STE/MALvH 28.40.1 298 C 1981MAJ/SVOvH 27.50.1 313 C 1981MAJ/SVOvH 26.50.1 328 C 1981MAJ/SVOvH 246295 30.0 280 1987STE/MAL, 1970DYK

C2Br4 79-28-7 tetrabromoethylenesubH 221310 44.2 236 1987STE/MAL

C2ClFN2 30915-40-3 cis chlorofluoroiminoacetonitrilevH 254320 31.7 269 A 1987STE/MAL, 1971ZAB/SHR

C2ClFN2 30915-39-0 trans chlorofluoroiminoacetonitrilevH 257320 32.7 272 A 1987STE/MAL, 1971ZAB/SHR

C2ClF2NO2 42016-33-1 chlorofluorocarbonylcarbamic fluoridevH 36.8 376 1973SPR/WRI

C2ClF3 79-38-9 chlorotrifluoroethylenefusH 5.55 115 1996DOM/HEA

vH 206262 21.8 247 A 1987STE/MALvH 298379 20.2 313 A 1987STE/MALvH 206263 21.7 248 1951MCC/PERvH 195250 21.9 235 1933HEI/MUR

C2ClF3O2 23213-83-4 chloroformic acid, trifluoromethyl estervH 195273 24.1 258 A 1987STE/MAL




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


C2ClF3O4S 6069-32-5 difluorochloroacetic acid, fluorosulfuric acid anhydridevH 265352 39.8 280 A 1987STE/MAL, 1966DES/CAD, 1999DYK/SVO

C2ClF4NO 42016-31-9 chlorotrifluoromethylcarbamic fluoridevH 28.9 310 1973SPR/WRI

C2ClF4NO4S 42016-34-2 fluorosulfuric acid, chlorotrifluoromethylcarbamic acid anhydridevH 28.5 398 1973SPR/WRI

C2ClF5 76-15-3 chloropentafluoroethanetrsH 2.63 80.2fusH 1.88 173.7 1996DOM/HEA

vH 262317 19.7 277 A 1987STE/MALvH 234265 20.1 250 A 1987STE/MALvH 312353 19.7 327 A 1987STE/MALvH 178234 20.9 219 1966MEA/ROSvH 176235 20.9 220 A 1987STE/MAL, 1955AST/WILvH 19.40.1 234 C 1955AST/WIL

C2ClF5O 22675-67-8 hypochlorous acid, pentafluoroethyl estervH 193248 25.0 233 A 1987STE/MAL, 1973DEM/SHR

C2ClF5OS 39937-08-1 pentafluoroethanesulfinyl chloridevH 273338 32.7 288 A 1987STE/MAL, 1964RAT/SHR, 1999DYK/SVO

C2ClF5O3S 649-61-6 2-chlorotetrafluoroethyl fluorosulfatevH 248330 32.9 289 1963GIL/CAD

C2ClF5O6S2 1957-17-1 1,2,2-trifluoro-1-chloro-1,2-ethanediol bisfluorosulfatevH 308406 53.2 323 A 1987STE/MAL, 1999DYK/SVO

C2ClF6NOS 74366-11-3 pentafluoroethylimidosulfurous chloride fluoridevH 35.6 326 I 1980ABE/SHR

C2ClF6P 650-52-2 bistrifluoromethyl chlorophosphinevH 193273 27.8 258 1964PET/BUR, 1984BOU/FRI

C2ClF6PS2 660-05-9 chloro bistrifluoromethylthiophosphinevH 293373 33.0 333 1960EME/PUG

C2ClF9NP 13105-57-2 bistrifluoromethylaminotrifluorochlorophosphorousVvH 223273 26.4 248 1966RIN/ONE

C2ClF9S 646-63-9 2-chlorotetrafluoroethylsulfur pentafluoridevH 28.3 320 1961CAS/RAY, 1999DYK/SVO

C2Cl2F2 598-88-9 1,2-dichloro-1,2-difluoroethylenevH 191294 27.9 279 A 1987STE/MALvH 240294 27.2 279 1933BOO/BUR

C2Cl2F2N2 30913-21-4 dichlorodifluoroaminoacetonitrilevH 238341 26.8 253 A 1987STE/MAL, 1971ZAB/SHR

C2Cl2F2O 354-18-7 fluorodichloroacetyl fluoridevH 208273 21.8 258 A 1987STE/MAL

C2Cl2F3NO 32751-03-4 N,N-dichloro-2,2,2-trifluoroacetamidevH 40.9 1972DEM/SHR

C2Cl2F3NO 354-71-2 1,2-dichlorotrifluoro-1-nitrosoethanevH 307310 29.0 308 I 1960GRI/HAZ




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


C2Cl2F3NOS 24433-67-8 S,S-dichloro-N-trifluoroacetyl sulfiliminevH 306333 44.2 319 A 1987STE/MAL, 1969GLE/VON, 1999DYK/SVO

C2Cl2F3NO2S 51587-33-8 trifluoromethylsulfonyl carbonimidic dichloridevH 312405 44.1 327 A 1987STE/MAL, 1999DYK/SVO

C2Cl2F4 374-07-2 1,1-dichloro-1,2,2,2-tetrafluoroethanevH 231373 23.5 246 A 1987STE/MAL, 1970DYKvH 23.2 233 BG 1955MEA/STAvH 22.5 273 BG 1955MEA/STAvH 20.8 313 BG 1955MEA/STAvH 17.7 353 BG 1955MEA/STA

C2Cl2F4 76-14-2 1,2-dichloro-1,1,2,2-tetrafluoroethanetrsH 1.21 109.3trsH 2.63 134.6fusH 1.51 180.6 1996DOM/HEA

vH 277391 24.3 292 A 1987STE/MALvH 210277 25.1 262 A 1987STE/MALvH 178277 25.3 261 1947STU

C2Cl2F4O4 38126-28-2 perchloric acid, 1,1,2,2-tetrafluoro-2-chloroethyl estervH 249294 32.6 279 A 1987STE/MAL, 1973SCH/PIL

C2Cl2F5NS 10564-48-4 S,S-dichloro-N-pentafluoroethyl sulfiliminevH 297375 37.4 312 A 1987STE/MAL, 1999DYK/SVO

C2Cl2F8NP 13105-58-3 bistrifluoromethylaminodifluorodichlorophosphorousVvH 262305 32.9 293 1966EME/ONA

C2Cl3F3 354-58-5 1,1,1-trichloro-2,2,2-trifluoroethanevH 28.10.1 298 C 1980MAJ/SVOvH 27.20.1 313 C 1980MAJ/SVOvH 26.30.1 328 C 1980MAJ/SVOvH 297319 28.9 308 1980MAJ/SVOvH 286310 29.2 298 A 1987STE/MAL, 1963HIR/HIL

C2Cl3F3 76-13-1 1,1,2-trichloro-1,2,2-trifluoroethanetrsH 0.83 82.5fusH 2.47 236.9 1991ACR

subH 205233 32.9 219 A 1947STU

vH 273319 28.3 288 A 1987STE/MALvH 238364 30.9 253 A 1987STE/MALvH 360473 26.9 375 A 1987STE/MALvH 297317 28.8 307 A 1987STE/MALvH 28.40.1 298 C 1980MAJ/SVOvH 27.50.1 313 C 1980MAJ/SVOvH 26.60.1 328 C 1980MAJ/SVOvH 28.20.4 298 1974VAR/BULvH 273318 28.2 288 1963HIR/HILvH 248356 30.8 263 1940BEN/MCHvH 243353 NA 1939REI

C2Cl3F3 na trichlorotrifluoroethanevH 248352 30.5 263 1938REI

C2Cl3F3O4 38126-27-1 perchloric acid, 1,2,2-trifluoro-1,2-dichloroethyl ester




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


vH 273296 26.9 284 A 1987STE/MAL

C2Cl3N 545-06-2 trichloroacetonitrilevH 289357 35.1 304 A 1987STE/MAL, 1970DYKvH 289356 34.7 304 1954DAV/JEN

C2Cl4 127-18-4 tetrachloroethylenetrsH 0.82 210fusH 10.88 250.8 1996DOM/HEA

vH 307393 38.4 322 1995DEJ/BURvH 310393 38.7 325 A 1987STE/MAL, 1972BOU/AIMvH 300380 38.9 315 1970POL/MUR, 1984BOU/FRIvH 333373 37.6 348 1967FRI/GALvH 39.70.1 298 C 1980MAJ/SVA

C2Cl4F2 76-12-0 1,2-difluoro-1,1,2,2-tetrachloroethanetrsH 0.79 130fusH 3.7 299.7 1991ACR, 1978KIS/SUG

subH 235293 36.4 278 1987STE/MAL, 1947STUsubH 237293 38.2 265 A 1947STU

vH 313361 34.80.4 298 2007VAR/DRU, 1976VAR/BULvH 34.60.1 308 C 1992SVO/KUB2vH 34.10.1 315 C 1992SVO/KUB2vH 33.60.1 323 C 1992SVO/KUB2vH 33.10.1 330 C 1992SVO/KUB2vH 32.60.1 338 C 1992SVO/KUB2vH 301365 36.6 316 A 1987STE/MALvH 235293 36.4 278 A 1987STE/MALvH 312362 34.0 327 A 1987STE/MALvH 283364 32.7 298 1933HOR/GEI

C2Cl4F2O3S na 2-fluorotetrachloroethyl fluorosulfatevH 311437 42.0 329 1963GIL/CAD

C2Cl4F2O4 38126-29-3 perchloric acid, 1,2-difluoro-1,2,2-trichloroethyl estervH 273294 30.2 283 A 1987STE/MAL, 1973SCH/PIL

C2Cl4F4N2 35695-53-5 1,2-bisdichloroamino tetrafluoroethanevH 43.1 1972DEM/SHR

C2Cl4F6OS 762-90-3 pentafluoro2-fluoro-1,1,2,2-tetrachloroethoxy sulfurvH 314418 42.8 329 A 1987STE/MAL, 1962WIL/CAD

C2Cl4O 16650-10-5 tetrachloroethylene oxidevH 308348 36.9 323 A 1987STE/MAL

C2Cl4O 76-02-8 trichloroacetyl chloridevH 305393 38.3 320 A 1987STE/MAL, 1959MCD/SHR, 1970DYK

C2Cl6 67-72-1 hexachloroethanetrsH 2.57 318trsH 8.22 345fusH 9.75 458 1996DOM/HEA

subH 317345 58.9 331 1987STE/MALsubHmp 186.6

306459 48.8 382 A 1947STU

subH (triclinic) 286447 59.10.7 367 1947IVI/DAI, 1960JON, 1970COX/PIL




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


subH (cubic) 286447 51.0 367 1947IVI/DAI, 1960JONsubH NA GSM 1941NIT/SEKsubH 335453 50.5 1935LEEsubH 288333 59.0 310 GS,A 1930NEL

vH 460513 40.3 475 A 1987STE/MALvH 345460 51.2 360 A 1987STE/MAL, 1970DYKvH 305458 53.7 320 1947STU

C2FNO2 15435-14-0 fluorocarbonyl isocyanatevH 228264 33.5 249 A 1987STE/MAL, 1967GLE/BIE

C2F2N2O 32837-63-1 difluorocarboncyamidic amidevH 29.7 383 1973WRI/SHR

C2F2N2O2 32837-64-2 difluorocarbonisocyantidic amidevH 33.9 327 1973WRI/SHR

C2F2N4O8 20165-39-3 1,2-difluoro-1,1,2,2-tetranitroethanevH 297323 62.8 310 A 1987STE/MAL, 1973PEP/LEB

C2F2O2 359-40-0 oxalyl fluoridesubH 234260 16.7 247 1987STE/MAL

vH 264272 29.7 268 1987STE/MAL

C2F2O4 692-74-0 bisfluorocarbonylperoxidevH 226266 30.6 251 1962VON/AYM, 1984BOU/FRI

C2F3N 353-85-5 trifluoroacetonitrilefusH 4.97 128.7 1996DOM/HEA

vH 151206 19.3 191 A 1987STE/MALvH 141203 19.2 188 A 1987STE/MALvH 197241 18.5 226 A 1987STE/MALvH 336282 17.4 309 A 1987STE/MALvH 272311 17.4 287 A 1987STE/MALvH 142206 19.2 191 1961PAC/BOB

C2F3NO 460-49-1 trifluoromethyl isocyanatevH 195228 22.5 213 A 1987STE/MAL

C2F3NO 2713-04-4 trifluoronitrosoethylenevH 247250 25.7 248 A,I 1987STE/MAL, 1960GRI/HAZ

C2F3NOS 61951-27-7 trifluoromethanesulfinyl cyanidevH 40.2 352 I 1977BUR/SHR

C2F3NOS 691-03-2 trifluoroemethylsulfenyl isocyanatevH 231293 27.9 278 A 1987STE/MAL, 1999DYK/SVO, 1963EME/HAA

C2F3NO2S 26454-68-2 2,2,2-trifluoro-N-sulfinylacetamidevH 267302 36.4 282 A 1987STE/MAL, 1999DYK/SVO

C2F3NO2S2 51587-30-5 trifluoromethanesulfonyl isothiocyanatevH 297385 41.0 312 A 1987STE/MAL, 1999DYK/SVO

C2F3NO3S 30227-06-6 trifluoromethanesulfonyl isocyanatevH 275345 36.9 290 A 1987STE/MAL, 1999DYK/SVO

C2F3NS 690-24-4 thiocyanic acid, trifluoromethyl estervH 226294 32.6 279 A 1987STE/MAL, 1999DYK/SVO, 1963EME/HAA




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


C2F3N3O6 20165-38-2 1,1,2-trifluoro-1,2,2-trinitroethanevH 313353 57.7 328 A 1987STE/MAL, 1973PEP/LEB

C2F4 116-14-3 tetrafluoroethylenefusH 7.71 142 1996DOM/HEA

vH 197273 16.8 258 A 1987STE/MALvH 273306 16.6 288 A 1987STE/MALvH 142208 18.6 193 A 1987STE/MAL, 1953FUR/MCC, 1984BOU/FRI

C2F4N2 5131-88-4 tetrafluoroaminoacetic, nitrilevH 193238 23.9 223 A 1987STE/MAL

C2F4N2O3 679-08-3 1,1,2,2-tetrafluoro-1-nitro-2-nitrosoethanevH 233293 28.8 278 A 1987STE/MAL

C2F4N2O4 356-16-1 1,1,2,2-tetrafluoro-1,2-dinitroethanevH 303343 67.8 323 1973PEP/LEBvH 259333 34.7 274 A, I 1987STE/MAL, 1957FRA/SAN

C2F4N2O6S2 19252-50-7 1,2-bisfluoroformyl-1,2-bisfluorosulfonylhydrazinevH 273296 49.8 284 A 1987STE/MAL, 1999DYK/SVO

C2F4O 354-34-7 trifluoroacetyl fluoridevH 161215 20.9 200 A 1987STE/MAL, 1972PAC/HOD

C2F4O2S 684-106 trifluoroethylene sulfonyl fluoridevH 270313 27.0 285 A 1987STE/MAL, 1999DYK/SVO

C2F4O3 16118-40-4 fluoroperoxyformic acid, trifluoromethyl estervH 194249 27.3 234 A 1987STE/MAL

C2F4O4S 5762-53-8 trifluoroacetyl fluorosulfatevH 262321 34.3 277 A 1987STE/MAL, 1966DEL/SHRvH 250320 34.9 265 1966MEA/ROS

C2F4S2 1717-50-6 tetrafluoro-1-3-dithietanevH 29.2 1973ABE/SHR

C2F5I 354-64-3 pentafluoroiodoethanevH 248283 20.8 268 A 1987STE/MAL

C2F5NO 32822-49-4 pentafluoroacetamidevH 23.8 252 HG 1971DEM/SHR

C2F5NO 354-72-3 pentafluoronitrosoethanevH 193227 20.9 212 A 1987STE/MAL, 1956BAR/HAS

C2F5NOS 32837-66-4 carbamothioic acid, difluoro-S-trifluoromethyl estervH 23.0 315 1973WRI/SHR

C2F5NOS 24433-65-6 S,S-difluoro-N-trifluoroacetyl sulfiliminevH 240282 34.4 267 A 1987STE/MAL, 1969GLE/VON, 1999DYK/SVO

C2F5NOS 28103-61-9 1,1,1-trifluoro-N-fluoroformylmethanesulfinimidyl fluoridevH 276323 38.9 291 A 1987STE/MAL, 1999DYK/SVO

C2F5NOS 10564-50-8 1,1,2,2,2-pentafluoro-N-sulfinyl ethylaminevH 245303 29.0 260 A 1987STE/MAL, 1999DYK/SVO

C2F5NO4S 19252-49-4 fluorosulfonyltrifluoromethoxycarbamoyl fluoridevH 277290 30.3 283 1999DYK/SVO




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


C2F5N3O3 755-68-0 fluoro1,1,2,2-tetrafluoro-2-nitroethyl-2-diimide oxidevH 257350 38.0 272 A 1987STE/MAL

C2F6 76-16-4 hexafluoroethanetrsH 3.74 104fusH 2.69 173.1 1996DOM/HEA

subH 26.0 103 1963BON, 1948PAC/AST

vH 172200 17.3 186 A 1987STE/MALvH 180196 17.1 188 1948PAC/AST

C2F6IN 5764-87-4 N-iodo-bistrifluoromethylaminevH 261318 28.5 276 A 1987STE/MAL

C2F6IP 359-64-8 bistrifluoromethyl phosphinous iodidevH 273320 33.2 288 1964PET/BUR, 1984BOU/FRI

C2F6N2 372-63-4 hexafluoroazomethanevH 205242 22.9 227 A 1987STE/MAL

C2F6N2O 371-56-2 hexafluoroazoxymethanevH 274281 27.2 277 A 1987STE/MAL

C2F6N2O2 359-75-1 1,1,1-trifluoro-N-nitrosooxy-N-trifluoromethylmethanaminevH 245285 26.8 270 A 1987STE/MAL

C2F6N2O2 367-54-4 N-nitroso-O,N-bistrifluoromethylhydroxylaminevH 272283 25.4 277 A 1987STE/MAL, 1954JAN/HAS

C2F6OS 30341-37-8 bistrifluoromethylsulfoxidevH 248303 27.9 263 A 1987STE/MAL, 1999DYK/SVO

C2F6OS 20621-31-2 pentafluoroethyl sulfinyl fluoridevH 234293 28.5 278 A, I 1987STE/MAL, 1968RAT/SHR, 1999DYK/SVO

C2F6OS2 63548-94-7 S-trifluoromethyl-trifluoromethylthiosulfinatevH 293353 30.7 333 1999DYK/SVO

C2F6OS2 na methanesulfonothioic acid, trifluoro-S-trifluoromethyl estervH 27.8 329 I 1976BUR/SHR

C2F6O2S 354-87-0 perfluoroethyl fluorosulfatevH 250300 28.8 275 1963GIL/CAD

C2F6O3 1718-18-9 bistrifloromethyl trioxidevH 193248 24.3 233 A 1987STE/MAL

C2F6O3S 3582-05-6 trifluoromethanesulfonic acid, trifluoromethyl estervH 238294 29.4 252 1999DYK/SVOvH 238294 27.6 279 A 1987STE/MAL, 1965NOF/CAD

C2F6O4S 1479-52-3 bistrifluoromethyl sulfatevH 219304 28.7 262 1960VAN/CAD

C2F6O5S 41765-14-4 peroxysulfuric acid, bistrifluoromethyl estervH 253319 32.0 268 1999DYK/SVO

C2F6O6S2 1479-53-4 tetrafluoroethylene glycol, bisfluorosulfatevH 295378 43.7 310 A 1987STE/MAL, 1970DYK, 1999DYK/SVO

C2F6O7S2 na bistrifluoromethyl disulfatevH 328357 38.3 342 1960VAN/CAD




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


C2F6S 371-78-8 bistrifluoromethyl sulfidevH 23.6 1952BRA/EME

C2F6S2 372-64-5 bistrifluoromethyl disulfidevH 28.8 1952BRA/EME

C2F7N 359-62-6 perfluorodimethylaminevH 199230 21.4 215 A 1987STE/MALvH 203233 18.6 218 A 1987STE/MAL, 1949THO/EME

C2F7N 354-80-3 perfluoroethylaminevH 171236 20.8 221 A 1987STE/MAL, 1970DYK

C2F7NOS 59617-28-6 pentafluoroethylimidosulfuryl fluoridevH 30.7 1976STA/MEW

C2F7NO3S 4188-34-5 fluorosulfuric acid, 1,1,2,2-tetrafluoro-2-difluoroaminoethyl estervH 276326 31.1 291 A 1987STE/MAL, 1999DYK/SVO

C2F7NO12S4 53684-02-9 fluorosulfuric acid, 1-bisfluorosulfonyloxoamino-2,2,2-trifluoroethylidene estervH 43.4 418 1975KIR/LAS

C2F8NOP 13105-59-4 bisdifluoromethylamino difluorophosphine oxidevH 233278 30.4 255 1966EME/ONA

C2F8NOP 36544-19-1 phosphorous bistrifluoromethylnitroxide difluoridevH 28.0 288 1973WAN/SHR

C2F8OS 33716-15-3 difluorooxo-bis-trifluoromethylsulfurvH 239299 22.4 254 A 1987STE/MAL, 1999DYK/SVOvH 28.4 1971SAU/SHR

C2F8OS 82390-51-0 pentafluorotrifluoroacetyl sulfurvH 162290 26.6 177 1999DYK/SVO

C2F8O3S 60672-61-9 pentafluoro trifluoroethaneperoxoato sulfurvH 28.0 1976HOP/DES

C2F8S 1186-51-2 trifluorovinyl sulfur pentafluoridevH 25.1 292 1961CAS/RAY

C2F8S 30341-38-9 difluoro bistrifluoromethyl sulfurvH 28.8 1971SAU/SHR

C2F10OS 1580-07-0 pentafluoropentafluoroethoxy sulfurvH 245287 27.6 272 A 1987STE/MAL, 1962WIL/CAD

C2F10O2S 2004-38-8 tetrafluorobistrifluoromethoxy sulfurvH 246302 29.9 261 A 1987STE/MAL, 1964DUN/CAD

C2F10O3S 41938-43-6 trifluoromethoxytrifluoromethyldioxy sulfur tetrafluoridevH 255317 32.5 270 1999DYK/SVO

C2F10O3S2 68010-32-2 pentafluoro1,2,2,2-tetrafluoro-1-fluorosulfonyloxyethyl sulfurvH 34.8 1978DEM/FOX

C2F10S 42179-02-2 trans tetrafluorobistrifluoromethyl sulfurvH 233293 23.3 278 A 1987STE/MAL, 1999DYK/SVO

C2F11NS 13888-13-6 bistrifluoromethylamino sulfur pentafluoridevH 233306 29.3 248 A 1987STE/MAL, 1966DOB, 1999DYK/SVO

C2F12S2 42060-66-2 perfluoro-1,3-dithietane octafluoride




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


vH 35.6 1973ABE/SHR

C2N2 460-19-5 cyanogenfusH 8.11 245.3 1996DOM/HEA

subH 202239 33.0 224 1987STE/MALsubH 177230 33.6 204 A 1947STUsubH 202245 34.4 CATH 1939RUE/GIAsubH 198240 32.4 224 1975GRO, 1925PER/BARsubH NA 1916TER

vH 240253 24.5 246 A 1987STE/MALvH 246273 23.9 257 1925PER/BARvH 246273 23.5 267 1925PER/BAR

C2N6O12 918-37-6 hexanitroethanesubH 70.7 298 1999MIR/VORsubH 293343 30.4 308 1987STE/MAL, 1963NOB/REEsubH 293313 70.71.7 303 ME 1969MIR/LEB, 1977PED/RYLsubH 293343 70.71.7 1968PEP/MIR

C2HBr 593-61-3 bromoacetylenevH 214273 25.6 273 A 1987STE/MAL

C2HBrClF3 151-67-7 2-bromo-2-chloro-1,1,1-trifluoroethanefusH 4.84 154.7 1996DOM/HEA

vH 302323 29.80.4 298 2007VAR/DRU, 1985PAS/VARvH 298323 30.0 310 A 1987STE/MALvH 29.60.3 298 1981PAP/ERAvH 29.60.1 298 C 1980MAJ/SVOvH 28.70.1 313 C 1980MAJ/SVOvH 27.80.1 328 C 1980MAJ/SVOvH 26.80.1 343 C 1980MAJ/SVOvH 227318 34.3 242 1965KUD/SAVvH 222329 33.2 237 A 1987STE/MAL, 1963BOT/SEI, 1970DYK

C2HBrClF3 354-06-3 1-bromo-2-chloro-1,1,2-trifluoroethanefusH 4.38 146.2 1996DOM/HEA

vH 30.00.1 298 C 1981MAJ/SVOvH 29.00.1 313 C 1981MAJ/SVOvH 28.10.1 328 C 1981MAJ/SVOvH 27.20.1 343 C 1981MAJ/SVO

C2HBrF8S 82390-50-9 1-bromo-2,2,2-trifluoroethylsulfur pentafluoridevH 32.0 1982DEM/FOX

C2HBr2FO2 353-99-1 dibromofluoroacetic acidvH 403468 60.2 468 A 1987STE/MAL

C2HBr3O 115-17-3 tribromoacetaldehydevH 291447 47.8 306 A 1987STE/MAL, 1947STU

C2HCl 593-63-5 chloroacetylenevH 204238 21.8 223 A 1987STE/MAL

C2HClF2 359-10-4 1,1-difluoro-2-chloroethenevH 23.5 233 BG 1955MEA/STAvH 21.4 273 BG 1955MEA/STAvH 18.5 313 BG 1955MEA/STA




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


vH 14.1 353 BG 1955MEA/STA

C2HClF6OS 20407-78-7 trans2-chloro-2-fluorovinyloxy sulfur pentafluoridevH 36.8 1968PLA/WIL

C2HClF6OS 20407-79-8 cis2-chloro-2-fluorovinyloxy sulfur pentafluoridevH 34.3 1968PLA/WIL

C2HClF8OS 20334-47-8 2-chloro-1,2,2-trifluoroethoxy sulfur pentafluoridevH 33.3 1968PLA/WIL

C2HClF12O2S 20563-90-0 2-chloro-2,2-difluoroethylidienedioxybispentafluorosulfurvH 39.0 1968PLA/WIL

C2HClF8S 22756-13-4 1,1,2-trifluoro-2-chloroethyl sulfur pentafluoridevH 279323 30.2 294 A 1987STE/MAL, 1999DYK/SVO

C2HCl2F3 306-83-2 1,1,1-trifluoro-2,2-dichloroethanefusH 5.51 145.7 2002VAR/DRU

vH 26.60.3 298 2002VAR/DRUvH 243448 28.7 258 MM 1992OGU/YAM

C2HCl2F3 354-23-4 1,1,2-trifluoro-1,2-dichlorochloroethanefusH 7.08 135.7 1999DRU/VAR

vH 26.80.3 298 2002VAR/DRU

C2HCl3 79-01-6 trichloroethylenefusH 8.45 188.5 1996DOM/HEA

vH 297360 34.2 313 1995AUC/GONvH 34.50.1 298 C 1980MAJ/SVAvH 280428 34.6 295 1987STE/MAL, 1970DYKvH 290359 36.2 305 1944MCDvH 298360 35.6 313 1912HER/RAT, 1984BOU/FRI

C2HCl3F2 354-21-2 1,1-difluoro-1,2,2-trichloroethanevH 297345 32.80.4 298 2007VAR/DRU, 1976VAR/BULvH 32.90.1 298 C 1997VAR/PAS

C2HCl3F2 354-15-4 1,2-difluoro-1,1,2-trichloroethanevH 289346 33.00.4 298 2007VAR/DRU, 1997VAR/PASvH 33.10.1 298 C 1997VAR/PAS

C2HCl3F2O3S 42087-88-7 fluorosulfuric acid, 2-fluoro-1,1,2-trichloroethyl estervH 317353 36.6 332 A 1987STE/MAL, 1999DYK/SVO

C2HCl3O 75-87-6 trichloroacetaldehydevH 235371 36.6 250 A 1987STE/MAL, 1947STU

C2HCl3O2 76-03-9 trichloroacetic acidfusH 5.88 330.7 1991ACR

vH 326473 65.0 341 A 1987STE/MAL, 1970DYKvH 385470 57.2 400 1959MCD/SHR

C2HCl4FS 2822-06-2 dichloromethylfluorodichloromethyl sulfidevH 322352 46.5 337 A 1987STE/MAL, 1999DYK/SVO

C2HCl5 76-01-7 pentachloroethanevH 274434 40.9 289 A 1987STE/MAL




MolecularFormula

CAS Reg No Compound

EnthalpyTemp K

RangetransHm


vH 298435 45.5 313 1930NEL

C2HF3O2 76-05-1 trifluoroacetic acidvH 285345 35.9 300 A 1987STE/MAL, 1962KRE, 1970DYK, 1984BOU/FRI

C2HF5 354-33-6 pentafluoroethanefusH 2.25 172.6 1996LUE/MAG

vH 22.8 175 C 1999WEBvH 21.9 190 C 1999WEBvH 20.9 205 C 1999WEBvH 20.3 215 C 1999WEB

C2HF5O 3822-68-2 pentafluorodimethyl ethervH 216238 22.3 239 I 2001KUL/DESvH 229331 19.3 260 EB 1996WEB/DEF2vH 229331 17.6 280 EB 1996WEB/DEF2vH 229331 15.6 300 EB 1996WEB/DEF2vH 240313 20.4 255 A 1992SAL/WAN

C2HF6NOS 34556-22-4 S,S-bistrifluoromethylsulfoximinevH 35.1 346 I 1972SAU/SHR

C2HF6NS2 na bistrifluoromethane sulphenimidevH 243293 36.5 268 1960EME/NAB

C2HF6OP 359-65-9 phosphinous acid, bistrifluoromethyl estersubH 233251 46.6 242 1987STE/MAL, 1962GRI/BUR

C2HF6OPS 35814-49-4 bistrifluoromethyl thiophospinic acidvH 283324 38.3 298 A 1987STE/MAL

C2HF6PS 1486-19-7 bistrifluoromethylmercaptophosphinevH 269304 30.7 286 1964CAV/EME

C2HF6PS2 1486-19-7 bistrifluoromethyl thiophosphinous acidvH 217280 32.9 265 A 1987STE/MAL, 1999DYK/SVO

C2HF6PS2 18799-75-2 phosphinodithioic acid, bistrifluoromethyl estersubH 273287 41.9 280 A 1987STE/MAL

C2HF7S 58636-78-5 2,2-difluoroethenyl pentafluorosulfurvH 27.7 1978DEM/FOX

C2HF9S 63011-80-3 pentafluoro 1,2,2,2-tetrafluoroethyl sulfurvH 28.0 1978DEM/FOX

C2H2 74-86-2 acetylenetrsH 2.54 142.7fusH 3.76 192.4 1976MIS/RIE

subH 98145 23.5 130 A 1987STE/MALsubH 133191 21.8 162 1960JONsubH 151193 25.2 193 1956AMBsubH 130189 22.7 160 A 1947STUsubH 89169 22.1 129 A 1943BUR

vH 258308 16.3 273 A 1987STE/MALvH 192308 16.7 207 A 1987STE/MALvH 19

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