Mössbauer spectra of tin(IV) complexes with chelating ligands

Abstract

Mössbauer parameters are reported for a range of tin(IV) complexes, containing the potentially chelating ligands 8-hydroxyquinoline (oxH) and salicylaldehyde (salH). There are three main types of complex: (i) SnY₂ ox₂ and SnY₂ sal₂(Y = halogen, alkyl, or aryl); (ii) SnCl_4–nox_n(n= 0–4); and (iii) SnX₄,2oxH and SnX₄,2salH (X = halogen). From the quadrupole splitting data it is suggested that the carbon atoms in the complexes SnY₂ox₂(Y = alkyl or aryl) and the oxygen atoms in the complexes SnX₄,2oxH occupy cis-positions. On the other hand trans-configurations are assigned to SnX₄,2salH. Polymeric structures are suggested for SnCl₄,oxH, SnCl₃ox, and SnClox₃.