kinetics of the thermal rearrangement of [1.1.1]propellane (1) have been investigated by gas-phase pyrolysis in a stationary system. The unimolecular reaction leads to dimethylenecyclopropane (2) and its thermal isomerization product ethenylidenecyclopropane (5) with the following Arrhenius parameters: log(A/s-1) = 14.02 ± 0.23; EA/kcal mol-1 = 39.66 ± 0.52. Furthermore, it was shown that the minor
[1.1.1] 推进剂 (1) 的热重排动力学已通过固定系统中的气相热解进行了研究。单分子反应生成二
亚甲基环丙烷 (2) 及其热异构化产物亚
乙烯基环丙烷 (5),其 Arrhenius 参数如下:log(A/s-1) = 14.02 ± 0.23;EA/kcal mol-1 = 39.66 ± 0.52。此外,还表明次要产物亚甲基
环丁烯 (3) 及其热异构化产物
1,2,4-戊三烯 (6) 由反应容器表面催化的多相副反应产生。势能面的从头算和 DFT 计算表明异构化遵循异步反应路径,其中涉及 [1.1.1] 推进器 (1) 的两个侧键。CC
SD(T)/6-311G(2d,p)//MP2/6-311G(2d,