Stable Push–Pull Disilene: Substantial Donor–Acceptor Interactions through the Si═Si Double Bond

Abstract

The push–pull effect has been widely used to effectively tune π-electron systems. Herein, we report the synthesis and properties of 1-amino-2-boryldisilene 1 as the first push–pull disilene. Its spectroscopic and structural features show substantial interactions between the Si═Si double bond and the amino and boryl substituents. The π → π* absorption band of 1 is remarkably red-shifted compared to that of the corresponding alkyl-substituted disilene 2 . Treatment of 1 with H 2 resulted in the cleavage of two molecules of H 2 under concomitant formation of the corresponding trihydridodisilane and hydroborane.