Reactions of tellurium(IV) chlorides with some organosilicon hydrides

Abstract

The reactions of several organosilicon hydrides Ph n SiH 4- n , n = 1, 2; R 3SiH, R 3 = Ph 3, Ph 2Me, PhMe 2 (n-C 6H 13) 3; ( p-Me 2HSi) 2C 6H 4, with TeCl 4 in benzene resulted in the formation of tellurium metal and chlorosilanes in 75–90% yields. Similar reactions with aryltellurium trichlorides (RTeCl 3, R = Ph, p-MeOC 6H 4, p-EtOC 6H 4) proceeded in two different ways. On stirring at room temperature for 6–8 h, diaryl ditellurides and chlorosilanes were obtained in 70–95% yields whereas on refluxing for 6–10 h, tellurium powder and diaryltellurium dichlorides were obtained along with the chlorosilanes in 80–95% yields. Diaryltellurium dichlorides (R 2TeCl 2, R = Ph, p-MeOC 6H 4) did not react readily with PhSiH 3 nor with Ph 3SiH.