An Isolable Boryl-substituted Disilene from the Reaction of an sp<sup>2</sup>-type Silyl Anion with Haloboranes: Synthesis and Characterization
作者:Shigeyoshi Inoue、Masaaki Ichinohe、Akira Sekiguchi
DOI:10.1246/cl.2008.1044
日期:2008.10.5
The disilenyllithium, (t-Bu2MeSi)2Si=Si(SiMet-Bu2)Li (2a), reacted with B-chloropinacolborane (pin)BCl, or B-chlorocatecholborane (cat)BCl in toluene to produce the corresponding boryl-substituted disilenes 3a and 3b, which were isolated as air-sensitive yellow crystals. X-ray crystallographic analysis of 3b showed a nearly planar geometry around the Si=Si bond lacking π-conjugation between the Si=Si bond and a vacant p orbital of boron.
二硅烯锂(t-Bu2MeSi)2Si=Si(SiMet-Bu2)Li (2a) 与 B-氯聚酰胺硼烷 (pin)BCl 或 B-氯酚硼烷 (cat)BCl 在甲苯中反应,生成相应的硼基取代的二硅烯 3a 和 3b,后者以对空气敏感的黄色晶体形式被分离出来。3b 的 X 射线晶体结构分析显示,其 Si=Si 键周围具有近乎平面的几何形状,并且 Si=Si 键与硼的空 p 轨道之间缺乏 π 络合。