β-Amino- and Alkoxy-Substituted Disilanides

Abstract

Our recent study on formal halide adducts of disilenes led to the investigation of the synthesis and properties of β-fluoro- and chlorodisilanides. The reaction of the functionalized neopentasilanes (Me₃Si)₃SiSiPh₂NEt₂ and (Me₃Si)₃SiSiMe₂OMe with KO^tBu in the presence of 18-crown-6 provided access to structurally related β-alkoxy- and amino-substituted disilanides. The obtained Et₂NPh₂Si(Me₃Si)₂SiK·18-crown-6 was converted to a magnesium silanide and further on to Et₂NPh₂Si(Me₃Si)₂Si-substituted ziroconocene and hafnocene chlorides. In addition, an example of a silanide containing both Et₂NPh₂Si and FPh₂Si groups was prepared with moderate selectivity. Also, the analogous germanide Et₂NPh₂Si(Me₃Si)₂GeK·18-crown-6 could be obtained.

Keywords: disilene adduct; germanide; silanide.