Thiourea complexes of tin(II) compounds

Abstract

The solid products obtained from the tin(II)–thiourea (tu)–anion systems (anion = Cl^–, Br^–, l^–, SO₄^2–, ClO₄^–, BF₄^–, HCO₂^–, MeCO₂^–, CH₂ClCO₂^–, and SO₃NH₂^–) are described and the following complexes are reported: Sn tu Cl₂; Sn₂ tu₅Cl₄,2H₂O; Sn tu Br₂; Sn₂ tu₅Br₄; Sn tu I₂; Sn tu₂SO₄; Sn tu₅SO₄; Sn tu₃ClO₄; Sn tu₆(BF₄)₂; Sn tu (HCO₂)₂; Sn tu (MeCO₂)₂; Sn tu₂(CH₂Cl·CO₂)₂ and Sn tu₅(SO₃NH₂)₂,H₂O. The pyrolysis of these materials distinguishes the complexes with weak and strong Sn–S bonds. The i.r. and ¹¹⁹Sn Mössbauer data for the materials are given and are interpreted in terms of the formation and structure of the thiourea complexes of the tin(II) compounds. These data show that the Sn–S bonds are strong in the halide and sulphate complexes but weak in the carboxylate, sulphamate, borofluoride, and perchlorate complexes.