The Mössbauer effect in tin(II) compounds. Part VII. Spectra of the complexes of tin(II) compounds with some oxygen- and some sulphur-containing donor molecules

Abstract

The preparation of a number of new complexes of tin(II) materials with oxygen donor ligands is reported. The new complexes described are SnX₂,Ph₃PO (X = Cl, Br, NCS, or ClO₄); SnX₂,2Ph₃PO (X = Cl or Br); SnX₂, C₅H₅NO (X = Br or NCS); SnX₂,2Me₂SO (X = Br or NCS); SnSO₄,(NH₂)₂CO; SnCl₂,(NH₂)₂CO; SnCl₂,Ph₃AsO; SnX₂,2L (X = Cl or Br, L = tetrahydrofuran); 2SnX₂,L (X = Cl or Br, L = diglyme); SnX₂,L (X = Cl or Br, L = 1,4-dioxan or 1,4-thioxan). The following new complexes with sulphur-containing donor molecules were prepared for comparison: SnX₂,L (X = Cl or Br, L = 1,4-dithian). The i.r. and ¹¹⁹Sn Mössbauer data of these complexes and of some of the known adducts of tin(II) compounds with these ligands are reported and are discussed in terms of the structures of and bonding in these materials. For some systems (ligand = acetone, dimethylformamide, 1,2-dimethoxyethane, diethyl sulphide, tetrahydrothiophen), from which no solid product could be isolated, information on the tin(II)–ligand bond was obtained from solutions of tin(II) halides in the ligand.