量子化学計算結果(Sulfoxide, Selenoxide)

Allyl Methyl Sulfoxide から Allyl Methanesulfenate への転位

Calculation Level ΔE / kcal mol-1 (vs Sulfoxide)
TSSulfenate
Experimental25.9
B3LYP/6-31G*16.080-9.006
B3LYP/6-31+G*17.432-6.165
HF/6-31+G*37.623-12.509
MP2/6-31+G*19.326-4.025
MP3/6-31+G*//MP2/6-31+G*26.396-8.680
MP4(D)/6-31+G*//MP2/6-31+G*24.277-8.375
MP4(DQ)/6-31+G*//MP2/6-31+G*27.322-8.382
MP4(SDQ)/6-31+G*//MP2/6-31+G*24.466-6.972
QCISD/6-31+G*//MP2/6-31+G*24.147-7.187
QCISD(T)/6-31+G*//MP2/6-31+G*20.261-6.510
CCSD/6-31+G*//MP2/6-31+G*25.073-7.881
CCSD(T)/6-31+G*//MP2/6-31+G*20.376-6.747

Allyl Methyl Selenoxide から Allyl Methaneselenenate への転位

Calculation Level ΔE / kcal mol-1 (vs Selenoxide)
TSSelenenate
B3LYP/6-31G*10.608-15.316
B3LYP/6-31+G*13.451-10.327
B3LYP/6-311++G**11.858-15.327
HF/6-31+G*31.095-19.276
MP2/6-31+G*12.979-8.630
MP3/6-31+G*//MP2/6-31+G*20.654-13.819
MP4(D)/6-31+G*//MP2/6-31+G*18.515-13.071
MP4(DQ)/6-31+G*//MP2/6-31+G*21.257-13.221
MP4(SDQ)/6-31+G*//MP2/6-31+G*18.800-11.306
MP4(SDTQ)/6-31+G*//MP2/6-31+G*12.664-8.905
QCISD/6-31+G*//MP2/6-31+G*19.019-11.325
QCISD(T)/6-31+G*//MP2/6-31+G*15.352-10.445

HF では TS のエネルギーを高く見積もりすぎ,B3LYP, MP2 ではやや低く見積もる。