Tetrahydrothiophene-l-oxide, TMSO, complexes of tin(IV) halides: crystal structures of SnCl_4(TMSO)_2[two polymorphs], SnBr_4( TMSO)_2 and Ph_2SnCl_2(TMSO)n (n = 1 and 2)

摘要

Crystal structures of five tin(IV) complexes containing the tetrahydrothiophene-l-oxide ligand, C_4H_8SO, TMSO, with Sn-O interactions, are described. They are trigonal bipyramidal Ph_2SnCl_2(TMSO), with TMSO and Cl in axial sites, and the octahedral complexes, Ph_2SnCl_2( TMSO)_2 and SnX_4(TMSO)_2, where X = Br or Cl. In the octahedral complexes, the TMSO ligands are cis to one another and are trans to the halides. The SnCl_4(TMSO)_ 2 complex has been obtained in two crystalline forms, one orthorhombic and isostructural with SnBr_4(TMSO)_2, and the other triclinic. Strengths of the interactions of the tin halides with dimethyl sulfoxide, (DMSO), and TMSO ligands are compared.