Generation of the Dianion from Tetrasilabicyclo[1.1.0]butane Derivatives

Abstract

Abstract Reductive cyclization of R2ClSi–SiCl2R′ with 5 equiv. of lithium naphthalenide followed by aqueous workup provides the corresponding cyclotetrasilane [(R2SiSiHR′)2]. Similar treatment converts RCl2SiSiClHR into a stereoisomeric mixture of cyclotetrasilanes [(RHSi)4]. Evidence is presented to indicate that the tetrasilabicyclo[1.1.0]butane derivatives formed as intermediates in these reactions are transformed into the dianions corresponding to the products.