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Exam
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes
the statement or answers the question.
1) Calculate the percentage of 1-chloro-2-methylbutane in the
following reaction. 1)
A) 23.14% B) 13.88% C) 27.77% D) 35.18% E) 11.56%
2) Which of the following is a chain propagation step in the
free radical chlorination of methane? 2)A) Cl + CH3 ? CH3Cl B) Cl2
? 2 Cl C) CH4 + Cl ? CH3 + HCl D) CH3 + CH4 ? CH4 + CH3
3) How many distinct dichlorination products can result when
isobutane is subjected to freeradical chlorination?
3)
A) 6 B) 4 C) 2 D) 1 E) 3
4) The reaction Br2 + CH3Br? CH2Br2 + HBr was carried out. Which
of the followingmechanism steps is productive, but relatively
unlikely to occur?
4)
A) Br + Br2 ? Br2 + Br B) Br + CH3Br? HBr + CH2BrC) Br + CH3 ?
CH3Br D) Br + CH2Br? CH2Br2
5) Calculate the percentage of 1-chloro-3,4-dimethylheptane
formed in the following reaction. 5)
A) 16.96 B) 6.70 C) 26.80 D) 11.16 E) 22.32
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6) Identify the most stable radical. 6)A)
B)
C)
D)
E)
7) Calculate the percentage of 1-chloro-2-methylbutane in the
following reaction. 7)
A) 35.18% B) 27.77% C) 13.88% D) 11.56% E) 23.14%
8) Which of the following represents the best preparation of
2-cyclopentenol from cyclopentane? 8)A) 1. Br2, h? 2. H2O2B) 1.
NBS, CCl4 2. H2O2 3. Br2, CCl4 4. NaOCH3C) 1. NBS, CCl4 2. Br2,
CCl4 3. NaOHD) 1. Br2, h? 2. NaOCH3 3. NBS, CCl4 4. H2OE) 1. NBS,
CCl4 2. NaOCH3 3. H2O2
9) If cyclohexane reacts with excess Cl2 at high temperature,
how many distinctdichlorocyclohexane products are possible? Include
all stereoisomers.
9)
A) 6 B) 8 C) 9 D) 5 E) 7
10) Which of the following is the most stable radical? 10)
A) I B) II C) III D) IV E) V
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11) The reaction Br2 + CH3Br? CH2Br2 + HBr was carried out.
Which of the followingmechanism steps is both productive and
relatively likely to occur?
11)
A) Br + CH2Br? CH2Br2 B) Br + CH3 ? CH3BrC) Br + CH3Br? HBr +
CH2Br D) Br + Br2 ? Br2 + Br
12) When (R)-2-bromobutane reacts with Cl2/hv, which of the
following is true?
I II
12)
A) Only I is formed.B) Only II is formed.C) I and II are formed
in equal amounts.D) I and II could never form under these
conditions.E) I and II are formed in unequal amounts.
13) Which of the following is not an intermediate or product in
the reaction of 13)
A) I B) II C) III D) IV E) V
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14) What is the major product of the following reaction? 14)
A) I B) II C) III D) IV E) V
15) Calculate the percentage of 3-chloro-3,4-dimethylheptane
formed in the following reaction. 15)
A) 22.32 B) 16.96 C) 11.16 D) 26.80 E) 6.70
16) What reagent can best be used to convert cyclopentene to
3-bromocyclopentene in a singlestep?
16)
A) NBS, ?B) Br2, h?C) HBrD) HBr with peroxideE) none of the
above
17) Rank the free radicals (I-III) shown below in order of
decreasing stability (ie, from most stableto least stable).
CH2CH2CH(CH3)2 I
CH3CH2C(CH3)2 II
CH3CHCH(CH3)2 III
17)
A) II > I > III B) III > II > I C) II > III >
I D) I > III > II E) I > II > III
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18) When butane undergoes free radical bromination, the product
mixture contains 98%2-bromobutane and 2% 1-bromobutane. How many
times more susceptible to hydrogen atomabstraction is a secondary
hydrogen in butane than is a primary hydrogen?
18)
A) 100 B) 50 C) 73.5 D) 1.5 E) 8.7
19) Which of the halogens below undergoes free radical
halogenation with ethane most rapidly? 19)A) fluorine B) bromine C)
chlorine D) pyridine E) iodine
20) How many distinct monochlorinated products, including
stereoisomers, can result when thealkane below is heated in the
presence of Cl2?
20)
A) 1 B) 2 C) 3 D) 4 E) 6
21) Which of the following is the rate-determining step for the
monobromination of cyclohexane? 21)
A) I B) II C) III D) IV E) V
22) Which of the following technique(s) can readily distinguish
between:
?
22)
A) NMR B) IR C) MS D) A and B E) A and C
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23) Which of the following is antiaromatic? 23)
A) I B) II C) III D) IV E) V
24) Which of the following structures is the most important
contributor to the resonance hybridformed when anisole undergoes
o-bromination?
24)
A) I B) II C) III D) IV E) V
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25) What is one of the products of the following reaction?
25)
A) I B) II C) III D) IV E) V
26) What is the major product of the following reaction? 26)
A) I B) II C) III D) IV E) V
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27) Identify the best product for the reaction. 27)
A)
B)
C)
D)
E)
28) The name 2,4,6-tribromobenzene is incorrect. Which of the
following is the correct name? 28)A) m,m-dibromobromobenzeneB)
m,m,m-tribromobenzeneC) 3,5-dibromobromobenzeneD) tribromobenzeneE)
1,3,5-tribromobenzene
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29) What is the name of the following compound? 29)
A) p-dichlorobenzeneB) 1,4-dichlorobenzeneC) phenyldichlorideD)
A and BE) B and C
30) Identify the major product for the reaction. 30)
A)
B)
C)
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D)
E)
31) What is the structure of p-toluidine? 31)
A) I B) II C) III D) IV E) V
32) Identify the major product(s) for the reaction. 32)
A)
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B)
C)
D)
E)
33) What is the best method for the preparation of
p-chlorotoluene in high yield? 33)A) start with p-aminotoluene;
NaNO2/HCl, 0C; CuClB) start with benzene; chlorinate; methylateC)
start with benzene; methylate; chlorinateD) start with toluene;
chlorinateE) start with chlorobenzene; methylate
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34) Which of the following structures is the most important
contributor to the resonance hybridformed when toluene undergoes
para nitration?
34)
A) I B) II C) III D) IV E) V
35) Give the best product(s) for the reaction. 35)
A)
B)
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C)
D)
E) no reaction
36) What is the structure of 3-phenylpentane? 36)
A) I B) II C) III D) IV E) V
37) Which of the following fails to produce benzoic acid when
heated in the presence of acidicsodium dichromate?
37)
A) 2-phenylethanolB) 1-phenylethanolC) 2-phenylheptaneD)
1-phenylheptanolE) 2-methyl-2-phenylheptane
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38) Which of the following substrates is an electron withdrawing
group overall? 38)
A) I B) II C) III D) IV E) V
39) Identify the best product for the following reaction.
39)
A)
B)
C)
D)
E)
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40) What is the major product of the following reaction? 40)
A) IB) IIC) IIID) A and B equallyE) A and C equally
41) Which of the following compounds reacts most rapidly with
HNO3/H2SO4? 41)A) nitrobenzeneB) fluorobenzeneC) tolueneD)
benzonitrileE) anisole
42) What is the proper name of the compound below? 42)
A) m-butylhydroxybenzeneB) o-butylhydroxybenzeneC) ethyl phenyl
etherD) 1-phenoxyethaneE) m-butylphenol
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43) What is the structure of phenol? 43)
A) I B) II C) III D) IV E) V
44) Identify the best product for the following reaction.
44)
A)
B)
C)
D)
E)
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45) Which of the following is the first step in the mechanism of
bromination? 45)
A) I B) II C) III D) IV E) V
46) What is the structure of styrene? 46)
A) I B) II C) III D) IV E) V
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47) Identify the best product for the following reaction.
47)
A)
B)
C)
D)
E)
+ LiBr
48) Identify the best product for the following reaction.
48)
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A)
B)
C)
D)
E)
49) What is the major organic product of the reaction between
benzene and isobutyl chloride inthe presence of AlCl3?
49)
A) isobutylbenzeneB) chlorobenzeneC) n-butylbenzeneD)
tert-butylbenzeneE) sec-butylbenzene
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50) Which of the following is most likely to be the first step
in the general mechanism forelectrophilic substitution
reactions?
50)
A) I B) II C) III D) IV E) V
51) Identify the major product for the following reaction.
51)
A)
B)
C)
D)
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E)
52) Which of the following is not a correct statement concerning
the Friedel-Crafts acylation ofbenzene?
52)
A) The acylium ion is often produced from an acyl chloride.B) An
alkyl group substitutes for a hydrogen.C) The acylium ion is
resonance stabilized.D) More than one equivalent of Lewis acid must
be used.E) The benzene ring attacks an acylium ion.
53) Name the following compound. 53)
A) tert-hexylbenzeneB) 2-phenylhexaneC) 3-phenylhexaneD)
sec-hexylbenzeneE) isohexylbenzene
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54) Identify the best product for the following reaction.
54)
A)
B)
C)
D)
E)
55) Which of the following is one of the resonance contributors
of the intermediate produced in aFriedel-Crafts alkylation of
benzene?
55)
A) I B) II C) III D) IV E) V
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56) Predict the major organic product of the following reaction.
56)
A) I B) II C) III D) IV E) V
57) Identify the best product for the following reaction.
57)
A)
B)
C)
D)
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E)
58) Which of the following is an aromatic hydrocarbon? 58)
A) I B) II C) III D) IV E) V
59) Which of the following is the electrophile that attacks the
aromatic ring during nitration? 59)A) NO2+ B) HNO3 C) NO2- D) NO2
E) HNO3-
60) Which of the following is aromatic? 60)
A) I B) II C) III D) IV E) V
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61) What is the major product of the following Friedel-Crafts
alkylation? 61)
A) I B) II C) III D) IV E) V
62) Which of the following is the electrophile that attacks the
aromatic ring during sulfonation? 62)A) SO2+ B) HSO4- C) HSO3- D)
H2SO4 E) HSO3+
63) Which of the following protons gives an NMR signal with the
highest chemical shift value(farthest downfield)?
(CH3)2CH?O?CH2CH2CH31 2 3 4 5
63)
A) 1 B) 2 C) 3 D) 4 E) 5
64) What is the ratio of the protons in the following compound?
64)
A) 3:2 B) 6:2 C) 3:3:3:2 D) 6:3:2 E) 9:2
65) Which of the following spectroscopic techniques uses the
lowest energy of the electromagneticradiation spectrum?
65)
A) NMR B) X-ray C) IR D) visible E) UV
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66) Predict the splitting pattern in the proton coupled 13C NMR
spectrum for the followingcompound.
66)
A) A, G = quintet; B = quartet; D, E = triplet; C, F = doubletB)
A, B, G = quartet; C, D, E, F = doubletC) A, B, G = triplet; C, D,
E, F = singletD) A, G = triplet; B = doublet; D, E = singletE) A, G
= quartet; B = triplet; D, E = doublet; C, F = singlet
67) How many signals would you expect to see in the 1H NMR
spectrum of the followingcompound?
67)
A) 3 B) 2 C) 4 D) 5 E) 1
68) What is the ratio of the protons in the following compound?
68)
A) 3:2:1 B) 3:3:2 C) 3:1 D) 6:2:1 E) 3:2
69) Which of the following is used in nuclear magnetic resonance
spectroscopy? 69)A) visible B) infrared C) X-ray D) ultraviolet E)
radio
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70) How many signals would you expect to see in the 1H NMR
spectrum of the followingcompound?
70)
A) 2 B) 7 C) 3 D) 4 E) 8
71) 1H nuclei located near electronegative atoms tend to be
________ relative to 1H nuclei whichare not.
71)
A) splitB) deshieldedC) shieldedD) resonancedE) none of the
above
72) Which of the following protons gives an NMR signal with the
lowest chemical shift value(farthest upfield)?
F?CH2CH2CH2CH2CH2?Br1 2 3 4 5
72)
A) 1 B) 2 C) 5 D) 4 E) 3
73) What splitting pattern is observed in the proton NMR
spectrum for the indicated hydrogens? 73)
A) septet B) singlet C) triplet D) doublet E) quartet
74) If the frequency for flipping a 1H nucleus at an applied
field of 1.4092 Tesla is 60 MHz, whatwould be the applied magnetic
field if the frequency is 360 MHz?
74)
A) 1.4092 TeslaB) 8.4552 TeslaC) 4.2577 TeslaD) 3.0439 TeslaE)
0.2349 Tesla
75) How many signals would you expect to see in the 1H NMR
spectrum of the followingcompound?
75)
A) 6 B) 5 C) 4 D) 3 E) 2
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76) What splitting pattern is observed in the proton NMR
spectrum for the indicated hydrogens?
CH3OCH2CH2OCH3?
76)
A) quartet B) singlet C) doublet D) triplet E) septet
77) Which compound has a 1H NMR spectrum consisting of the
following peaks: 0.9 (6H, d), 1.0(3H, t), 2.2 (2H, q), and 4.0 (1H,
septet)?
77)
A) (CH3)2CHOCH2CH3B) (CH3)2CHCH2CO2CH3C) (CH3)2CHCH2O2CCH3D)
(CH3)2CHCO2CH2CH3E) (CH3)2CHO2CCH2CH3
78) Give the integration and splitting pattern for each signal
in the 1H NMR spectrum. 78)
A) a = 2H, triplet; b = 3H, doublet; c = 2H, doublet; d = 1H,
singletB) a = 3H, triplet; b = 2H, sextet; c = 2H, quartet; d = 1H,
tripletC) a = 3H, triplet, b = 2H, quintet; c = 2H, triplet; d =
1H, singletD) a = 2H, triplet; b = 3H, sextet; c = 2H, triplet; d =
2H, doubletE) a = 3H, triplet, b = 2H, doublet; c = 2H, doublet,; d
= 1H, singlet
79) What splitting pattern is observed in the proton NMR
spectrum for the indicated hydrogens? 79)
A) singlet B) doublet C) septet D) triplet E) quartet
80) Predict the integration for each proton in the 1H NMR
spectrum. 80)
A) a = 5H; b = 5H; c = 7H; d = 7H; e = 7HB) a = 2H; b = 3H; c =
2H; d = 3H; e = 2HC) a = 3H; b = 2H; c = 2H; d = 3H; e = 2HD) a =
3H; b = 2H; c = 2H; d = 2H; e = 3HE) a = 2H; b = 3H; c = 2H; d =
5H; e = 2H
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81) Give the structure of a compound that has a formula of
C8H11N and has signals in the 13CNMR spectrum at 25.9 ppm (CH3),
51.1 ppm (CH), 125.9 ppm (CH), 126.6 ppm (CH), 128.3ppm (CH), and
148.5 ppm (C).
81)
A)
B)
C)
D)
E)
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