Allylsilanes show in certain cases a behaviour towards electrophiles which is opposite to that of its carbon homologues. Theoretical calculations using Dewar's MINDO/3 method performed on 3-methyl 3-butenyl trimethylsilane and 2-methyl 2-butene show that geometrical optimization leads to a silicon-allylic carbon bond nearly parallel to the double bond π cloud, and both net atomic charges and HOMO coefficients
烯丙基
硅烷在某些情况下显示出对亲电子试剂的行为,这与其碳同系物相反。使用Dewar的MINDO / 3方法对3-甲基3-
丁烯基三甲基
硅烷和
2-甲基-2-丁烯进行的理论计算表明,几何优化导致
硅-烯丙基碳键几乎平行于双键π云,并且两个净原子电荷和HOMO系数表明这两个衬底之间的反转。