Abstract
In 2004, we succeeded in synthesizing of the first isolable disilyne 1 {RSiSiR, R = SiiPr[CH(SiMe3)2]2}, and we have also investigated the unique reactivity of disilyne 1 toward alcohols, alkenes, alkynes, nitriles, and silylcyanides to understand the nature of the π bonds of the silicon-silicon triple bond. Some reactions gave the compounds containing Si=Si and Si=C double bond, and it was indicated that disilyne 1 could be a good precursor for the synthesis of the unsaturated silicon compounds. Herein we wish to report the recent results on the reactivity of disilyne 1 with secondary amines and hydroboranes, giving amino- and boryl-substituted disilenes, respectively. Their molecular structures were determined by NMR spectroscopy as well as X-ray crystallography, and the conjugation effect of lone-pair electron on nitrogen atom and vacant 2p-orbital on boron atom with π orbital of Si=Si double bond of disilene was also investigated.
