Trapping Experiments on a Trichlorosilanide Anion: a Key Intermediate of Halogenosilane Chemistry
作者:Julian Teichmann、Markus Bursch、Benedikt Köstler、Michael Bolte、Hans-Wolfram Lerner、Stefan Grimme、Matthias Wagner
DOI:10.1021/acs.inorgchem.7b00216
日期:2017.8.7
furnished the known products of a chloride-induced disproportionation reaction of the disilane, such as SiCl4, [Si(SiCl3)3]−, and [Si6Cl12·2Cl]2–. No Si–B-bonded products were detectable. In contrast, the addition of Si2Cl6 to [Et4N][BI3Cl] afforded the Si–B adduct [Et4N][I3SiBI3]. Thus, a quantitative Cl/I exchange at the silicon atom accompanies the trihalogenosilanide formation. [Et4N][I3SiBI3] was
在CH 2 Cl 2中用[Et 4 N] [BCl 4 ]处理Si 2 Cl 6提供了由氯化物引起的乙硅烷歧化反应的已知产物,例如SiCl 4,[Si(SiCl 3)3 ] -和[Si 6 Cl 12 ·2Cl] 2–。没有发现Si-B键合的产品。相反,在[Et 4 N] [BI 3 Cl]中添加Si 2 Cl 6可得到Si-B加合物[Et 4 N] [I 3 SiBI 3]。因此,在硅原子上定量的Cl / I交换伴随着三卤代硅烷化物的形成。还可以从Si 2 I 6,[Et 4 N] I和BI 3的混合物中获得[Et 4 N] [I 3 SiBI 3 ] 。根据X射线晶体学,阴离子[I 3 SiBI 3 ] -呈交错构象,其Si-B键长为1.977(6)Å。量子化学计算显示分子内I···I分散相互作用对极性共价Si–B键具有显着贡献。