Synthese und Reaktionsverhalten von Stannyloligosilanen, I. Kettenförmige Stannyloligosilane mit SiMe2-Einheiten

Stannyloligosilanes, Preparation, Crystal Structure Stannyloligosilanes 1 and 2 with terminal organotin groups are available by reacting alkali metal trior diorganostannides with a,-dichloroor difluorosilanes, or by treatm ent of organochlorostannanes with a,a»-difluorosilanes in the presence o f m agnesium . A ttem pts to functionalize the triorganotin derivatives 2 by halogenation reagents did not result in the halogen com pounds 5; instead cleavage o f silicon-tin bonds is observed. In contrast, reactions of the hydridotin derivatives 1 with C H X 3 (X = Cl, Br) lead to the quantitative formation of the bis(chloroor brom ostannyl)oligosilanes 5. A ll com pounds w ere characterized by NM R, IR, MS and elem ental analysis. In addition, the triorganotin com pound 2i and the hydridotin species lb have been characterized by X-ray crystallography.