Correlation of nuclear quadrupole resonance and 119mSn Mossbauer spectral parameters

Abstract

A precise redetermination of the 119mSn Mössbauer spectral parameters of a large number of organotin (IV) halides and of the tin (IV) tetrahalides has been made. The 35Cl NQR resonance spectra of (CH3)3SnCl and of (n-C5H11)2SnCL2 have been measured for the first time. These data, in conjunction with literature values of other halogen frequencies in this series, yield correlations of both the central tin atom Mössbauer isomer shift and quadrupole splitting values with the reduced ligand NQR coupling constants. The correlations may be interpreted qualitatively in terms of the bonding trends expected on the basis of ligand electronegativities, and the uniformities of the correlations strongly indicate a lack of sharply defined structural variations within these compounds.