Organometallic reactions. Part VIII. Addition reactions of dibutyltin dimethoxide and related compounds

Abstract

Dibutyltin dimethoxide reacts with a variety of multiply bonded acceptor molecules, AB (isocyanates, isothio-cyanates, aldehydes, carbon disulphide, sulphur dioxide, carbon dioxide, trichloroacetonitrile, and carbodimides), to give, in most cases, both 1 : 1 [Bu₂Sn(OMe)A·B·OMe] and 1 : 2 adducts [Bu₂Sn(A·B·OMe)₂]. The 1 : 2 adducts react with compounds Bu₂SnX₂ to give the products of disproportionation, Bu₂Sn(X)A·B·OMe, which can also be obtained by adding the monomethoxides, Bu₂Sn(X)OMe (X = Cl, Br, I, CNS, or O·COR) to the acceptors, AB.