Dimethyltin dihalide complexes and their infrared spectra

Abstract

Dimethyltin dichloride and dibromide form crystalline salts containing the ions Me₂SnX₃^– as well as Me₂SnX₄^2–. The infrared spectra of the former are consistent with the methyl groups occupying equatorial rather than apical position of a trigonal bipyramid. The spectra of complexes Me₂SnX₂,2L indicate the methyl groups to be in trans octahedral positions, with the remaining ligands in cis positions when X = Cl and L = pyridine or triphenyl-phosphine oxide.