Transcript
A More Quantitative Approach to Estimating Δoct
Trends dependent on the metal ion (page 642 H&S 3rd edition)
A More Quantitative Approach to Estimating Δoct
Using Jorgensen’s f and g factors
Δoct = f x g (if all ligands are the same)
Δoct = [(f1+f2+f3+f4+f5+f6)/6] x g(if ligands are different, take weighted average for f)
•f depends on the ligands, found in tables•g depends on the metal ion, found in tables, units of 1000cm-1
A More Quantitative Approach to Estimating Δoct
Using Jorgensen’s f and g factors
A More Quantitative Approach to Estimating Δoct
Using Jorgensen’s f and g factors
Sample Problem: Calculate Δoct for Rh(pyr)3Cl3
Low spin vs. high spin does not depend on just Δoct,Also depends on the electron pairing energy, P
Low spin vs. high spin does not depend on just Δoct,Also depends on the electron pairing energy, P
Using P (e- pairing energy) to Predict Low spin vs. High Spin
For high spin: Δoct < PFor low spin: Δoct > P
Metal ion P/gRh3+ d6 0.4Co3+ d6 0.7Fe2+ d6 0.9Fe3+ d5 1.1Mn2+ d5 1.5Co2+ d7 2.3
Using P (e- pairing energy) to Predict Low spin vs. High Spin
Magnetic Properties of Transition Metal Complexes
•Read pages 670-678 of H&S 3rd edition
HOW IS THE MAGNETIC MOMENT (μ) MEASURED?
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