ne have been investigated in the gasphase in the 100-160 degrees C range. The process leads to the almost exclusive formation of the relevant meta isomer with complete racemization and partial 1,2-H shift in the migrating sec-butyl group. These results, together with the relevant activation parameters, point to the occurrence of low-energy, tightly bound isomeric sec-butyl cation/toluene complexes
在100-160摄氏度的气相中研究了(S)-(+)-1-D(1)-3-(对甲苯基)丁烷的质子化诱导的单分子异构化的动力学和立体化学范围。该方法导致相关的间位异构体几乎排他地形成,具有完全消旋化和正在迁移的仲丁基基团发生部分1,2-H移位。这些结果与相关的活化参数一起,指出了沿异构化坐标具有确定结构和稳定性的低能,紧密结合的仲丁基阳离子/甲苯复合物。这些低能中间物种的存在和eta(1)型结构通过在MP2(full)/ 6-311 ++ G ** // HF / 6-31上密切相关的系统从头算得到证实+ G **理论水平。