Hyperconjugative stabilization of silicenium ions: kinetics of hydride abstractions from .beta.-element-substituted silanes
作者:Nils Basso、Solvig Goers、Eckhard Popowski、Herbert Mayr
DOI:10.1021/ja00067a018
日期:1993.7
Rates of hydride abstractions from j3-silyl-, j3-germyl-, and B-stannyl-substituted silanes (HSiMeZ(CHz- MMe3), M = Si, Ge, Sn) and related compounds by diarylcarbenium ions have been measured. The intermediate silicenium ions, produced in the rate-determining step, are stabilized by hyperconjugation, but the effects are much smaller than in comparable carbenium ions. ~~ ~~ ~~
已经测量了通过二芳基碳鎓离子从 j3-甲硅烷基-、j3-锗基-和 B-甲锡烷基取代的硅烷(HSiMeZ(CH-MMe3),M = Si、Ge、Sn)和相关化合物中提取氢化物的速率。在限速步骤中产生的中间硅离子通过超共轭稳定,但其影响远小于可比较的碳正离子。~~~~~~~