Tin Analogues of “Arduengo Carbenes”: Synthesis of 1,3,2λ2-Diazastannoles and Transfer of Sn Atoms between a 1,3,2λ2-Diazastannole and a Diazadiene This work was supported by the Deutsche Forschungsgemeinschaft. Parts were presented as a poster at the Jahrestagung Chemie 2001 der GDCH.

The cyclic stannylenes I which are accessible by transamination from [Sn(NSiMe3)2] and α-amino aldimines undergo easy cheletropic decomposition and may formally transfer a “naked” tin atom to a diazadiene. Computational studies suggest an electronic polarization in the form of the chelated atom canonical structure I′ as the reason for this behavior.