Silaethane : II: Darstellung und charakterisierung von 1,3-disilacyclobutanen

Abstract 1,3-Disilacyclobutanes of the types are prepared (a) by ring synthesis from chloromethylchlorosilanes R 1 R 2 Si(CH 2 Cl)Cl, (b) by thermolysis of monosilacyclobutanes R 1 R 2 SiCH 2 C H 2 CH 2 , and (c) by substitution of chlorine with alkyl groups in SiCl-containing 1,3-disilacyclobutanes, obtained by procedures (a) or (b). The compounds have been characterized by analytical and spectroscopic investigations. The synthetic methods are critically compared.