A Cyclic Disilylated Stannylene: Synthesis, Dimerization, and Adduct Formation

Reaction of 1,4-dipotassio-1,1,4,4-tetrakis(trimethylsilyl)tetramethyltetrasilane with [(Me3Si)(2)N](2)Sn led to the formation of an endocyclic distannene via the dimerization of a transient stannylene. In the presence of strong donor molecules such as PEt3, the stannylene could be trapped as adduct. Reaction of the PEt3 derivative with B(C6F5)(3) gave rise to the formation of the stannylene B(C6F5)(3) adduct.