Arrhenius parameters for rearrangements of the neophyl, 1-indanylmethyl, 2-allylbenzyl, and 2-(2-vinylphenyl)ethyl radicals relative to hydrogen abstraction from tributylstannane
作者:James A. Franz、Russell D. Barrows、Donald M. Camaioni
DOI:10.1021/ja00326a013
日期:1984.7
The temperature dependence of rates of several radical rearrangements relative to abstraction of hydrogen atom from tributylstannane has been determined. The rearrangement of 2-phenyl-2-methylpropyl to 1-phenyl-2-methylprop-2-yl (neophyl rearrangement) relative to hydrogen abstraction is represented by log (r/M) = (2.48 +/- 0.08) - (8.13 +/-0.16)/theta, theta = 2.3 RT kcal/mol. The rearrangement of
已经确定了与从三丁基锡烷中提取氢原子相关的几种自由基重排速率的温度依赖性。2-苯基-2-甲基丙基重排为 1-苯基-2-甲基丙基-2-基(新叶酸重排)相对于夺氢反应由 log (r/M) = (2.48 +/- 0.08) - (8.13) 表示+/-0.16)/theta,theta = 2.3 RT kcal/mol。2-烯丙基苄基重排为2-茚满甲基的重排为log (r/M) = (2.32 +/- 0.16)- (10.47 +/- 0.36/theta, 2-烯丙基苄基重排为2-四烯丙基的用log表示(r/M) = (2.18 +/- 0.28) - (12.47 +/- 0.60)/theta. 1-茚满甲基重排为 2-四烯丙基由 log (r/M) = (2.65 +/- 0.12) 表示) - (11.21 +/- 0.24)/theta. 2-(2-乙烯基苯基)乙基与五元环的闭合发生在