5-Thia-2,8(N-alkyl)diaza-1-stanna(II)-bicyclo[3.3.01,5]octane – Intramolekular basenstabilisierte Diazastannylene

5-Thia-2,8(N-alkyl)diaza-1-stanna(II)-bicyclo3.3.0^1,5]octanes – Intramolecular Basestabilized Diazastannylenes The title compounds are obtained by transamination of tin(II) dimethylamide with compounds of the type S(CH₂CH₂N(R)H)₂ (R = t-Bu, i-Pr) or by reaction of tin(II) chloride with the corresponding lithium amides. The monomeric structure is proved by temperature dependend ¹H-, ¹³C-, ¹¹⁹Sn n.m.r., and Mössbauer measurements.