Syntheses de Dialcoyl(organohydrogermyl)amines et Phosphines par Reactions D'Echange

Publisher Website
Google Scholar
Abstract
New dialkyl(phenylhydrogermyl)amines and dialkyl(phenylhydrogermyl)phosphines have been identified in the course of exchange reactions between phenylhalohydrogermanes and dialkyl(trialkylgermyl)amines and phosphines. Nevertheless, these reactions are limited by competitive hydrogermolysis reactions of Ge-N and Ge-P bonds by phenylhalohydrogermanes which have a hydrogen with “acid character”. These same secondary hydrogermolysis reactions become insignificant in the case of the interaction between alkylhalohydrogermanes and dialkyl(trialkylgermyl)amines, allowing quantitative formation of dialkyl(dialkylhydrogermyl)amines, R2(H)GeNR2. Dialkyl(hydrogermyl)amines and phosphines so obtained have generally a weak thermal stability. They exchange leading to symmetrical R2GeH2 and R2GeY2. These exchange reactions are also really appropriate for synthesis of tetragermanes (PhY2Ge)3GePh (Y = Me2N, Et2P) which may lead, by means of an α-elimination process, to functional organogermylenes, PhGeY.