Unexpected reactions of dichloro(ethyl)silane with DMSO in organic solvents
作者:S. V. Basenko、A. A. Maylyan
DOI:10.1007/s11172-017-1827-3
日期:2017.5
The effect of the solvent nature on the composition of the products formed upon the reaction between EtSi(H)Cl2 and DMSO (molar ratio 1: 1, 0 °C) was revealed. This reaction in non-polar and low polar solvents (toluene, chloroform) gives oligoethyl(hydro)cyclo-siloxanes ((EtSi(H)O)n, n = 3—8) as the major products in the yields up to 77%. In MeCN, oligoethyl(hydro)cyclosiloxanes are formed along with
1. From the untreated hydrolyzate of ethyldichlorosilane, cyclic trimer (C2H5SiHO)3 and tetramer (C2H6SiHO)4, and from the pyrolyzed hydrolyzate cyclic trimer, tetramer and pentamer (C2H5SiHO)5 have been acquired and characterized.2. The reactivity of the siloxane (Si–O–Si) linkage in the (C2H5SiHO)n compounds toward acid cleavage appears to be not so enhanced as that exhibited by the (CH3SiHO)n compounds