Rh–SnMexR4−x (symmetry D3h), in which the bulkiest group, e.g., R, is away from the surface could explain these results. This surface five-coordinate tin species could eliminate an alkyl group, generally a methyl group, thus decreasing the steric bulk around the tin, into the equatorial plane of D3h, via a concerted hydrogen transfer-elimination mechanism to give Rh–SnMex−1R4−x. Then, in the successive steps
ME的控制氢解X SNR 4 - X(0≤ X ≤4; R =甲基,正丁基,叔丁基, 新戊基, 环己基)到Rh / SiO 2上,然后对逸出的气体进行定量和定性分析。在放出的气体中仅检测到MeH和RH。Sn-C键存在氢解作用,而没有任何C-C键发生氢解作用,导致形成接枝的有机
金属片段。使用各种
有机锡化合物Me x SnR 4 − x,可以确定Sn–C键氢解的区域选择性。初始选择性与分子的空间体积成反比。烷基:t Bu