Mössbauer study of the cis–trans isomers of tin(IV) complexes. Some considerations about the sign of the electric-field gradient

Abstract

Mössbauer spectra are reported for the cis–trans isomers of SnCl₄L₂[L =NN-dimethylacetamide (dma), NN-dimethylformamide (dmf), dimethyl sulphoxide (dmso), or tetrahydrothiophen (tht)] and SnBr₄(dmf)₂. The following octahedral partial quadrupole splitting values were obtained: tht =+0.09, dmso =+0.14, dmf =+0.18, and dma =+0.20 mm s^–1. A correlation has been found between the quadrupole splitting and the values for ν(Sn–Cl)(from i.r. and Raman spectra) for trans-SnCl₄L₂.