Isomerism in adducts of tin(IV) tetrahalides with NN-dimethylacetamide, NN-dimethylformamide, and dimethyl sulphoxide in the solid state

Abstract

The adducts SnCl₄L₂(L = dimethylformamide, dmf, dimethylacetamide, dma, or dimethyl sulphoxide, dmso) and SnBr₄(dmf)₂ were isolated as cis isomers from different solvents. The compounds underwent transformations in the solid state and the trans isomers could also be obtained. The transitions in the solid state were studied by vibrational spectroscopy, thermal analysis, and X-ray powder diffraction. The adduct cis-SnBr₄(dma)₂ showed a transition in the solid state which could not be unequivocally characterized as an isomerization.