Cyclische Diazastannylene, IV1 Zur Oxidation von 1.3-Di-tert-butyl-2.2-dimethyl-1.3.2.4λ2 -diazasilastannetidin / Cyclic Diazastannylenes, IV1 Oxidation of 1,3-Di-tert-butyl-2,2-dimethyl-1,3,2,4λ2 -diazasilastannetidine

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Abstract
The reactions of 1,3-di-tert-butyl-2,2-dimethyl-1,3,2,4λ2-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 SnCLi- 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.