Cyclische Diazastannylene. - IV : Zur Oxidation von 1,3 Di-tert-butyl-2,2- dimethyl-1,3,2,4lambda2-diazasilastannetidin

Abstract

The reactions of 1,3-di-tert-butyl-2,2-dimethyl-1,3,2,4lambda2-diazasilastannetidine (1) with O2 and S8 or SnCl4 proceed in two steps: In a first redoxtype reaction an intermediate containing tetravalent tin is formed. Some of these intermediates are unstable with respect to the starting material stannylene 1 and undergo a substitution reaction to yield a spirotetraazastannane. Under appropriate conditions the intermediate from the sulfur- and SnCl4-reaction can be isolated and turns out to be either dispiro[3,3,3]distanna-disulfadisila-tetrazane or a diaza-dichlorostannane respectively. Crystal and kinetic data of some products/reactions are reported.