Primary deuterium kinetic isotope effects for the thermal [1, 7] sigmatropic rearrangement of 7-methylocta-1, 3 (Z), 5 (Z)-triene

JE Baldwin, VP Reddy

文献索引：Baldwin, John E.; Prakash Reddy, V. Journal of the American Chemical Society, 1988 , vol. 110, # 24 p. 8223 - 8228

全文：HTML全文

被引用次数: 21

摘要

OC through a first-order process characterized kinetically by the activation parameters log AH= 9.8 and EaH= 21.5 kcal/mol. Parallel kinetic work with the 7-deuterio-7- methyloctatriene establishes the Arrhenius parameters log AD= 10.3 and EaD= 23.5 kcal/mol. Thus AD/AH= 3.2 and (EaD-EaH)= 2.0 kcal/mol, and a substantial tunneling component for the [1, 7] sigmatropic hydrogen migration is evident.