Chemistry Letters, Vol.37, No.10, 1044-1045, 2008
An Isolable Boryl-substituted Disilene from the Reaction of an sp(2)-type Silyl Anion with Haloboranes: Synthesis and Characterization
The disilenyllithium, (t-Bu2MeSi)(2)Si=Si(SiMet-Bu-2)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 pi-conjugation between the Si=Si bond and a vacant p orbital of boron.