Studies in group IV organometallic chemistry XXIV. Structure of products obtained in the hydrostannation of ethynes

Abstract

Organotin monohydrides were brought into reaction with a variety of mono- and disubstituted ethynes. The identity of the resulting products was established by means of elementary analysis, infrared absorption spectroscopy and proton magnetic resonance spectroscopy.

In the hydrostannation of monosubstituted ethynes both α- and β- adducts are formed. Electron-withdrawing sustituents favour the formation of α-adducts. In the formation of the β-adducts, as well as in the hydrostannation of disubstituted ethynes, trans-addition seems to be the rule.