Mössbauer spectra and structures of organotin compounds. The relationship between quadrupole splitting and intermolecular association

The Mossbauer spectra of cyclohexyltin derivatives and of the compounds Ph2Sn(X)·[CH2]4·Sn(X)Ph2(X = I, OH, O·CO·Me, or Ph), BunSn(O·CO·Me)4–n(n= 2 or 3), and Bu2Sn maleate have been recorded. These data are used to define the range of quadrupole splittings associated with tetrahedral organotin compounds. It is shown that the simple point-charge model does not account for the quadrupole splittings of compounds with differing co-ordination numbers. Quadrupole splitting data are used empirically to discuss intermolecular association in organotin compounds.