Primary deuterium kinetic isotope effects for the thermal [1,7] sigmatropic rearrangement of 7-methylocta-1,3(Z),5(Z)-triene
作者:John E. Baldwin、V. Prakash. Reddy
DOI:10.1021/ja00232a040
日期:1988.11
6(Z)-triene over the temperature range 60-115degree}C through a first-order process characterized kinetically by the activation parameters log Asup H} = 9.8 and Esub a}sup H} = 21.5 kcal/mol. Parallel kinetic work with the 7-deuterio-7-methyloctatriene establishes the Arrheniusparameters log Asup D} = 10.3 and Esub a}sup D} = 23.5 kcal/mol. Thus Asup D}/Asup H} = 3.2 and (Esub a}sup D} - Esub