Tin(IV) to platinum(II) ligand transfer reactions of sulfinyl-containing Lewis bases

Article abstract of DOI:10.1016/S0020-1693(97)05480-7

The Pt(II) centres in trans-[PtCl(μ-Cl) (PEt₃)]₂ were shown to be able to abstract sulfinyl-containing Lewis bases from several of their Sn(IV) adducts and form stable Pt(II) complexes. Hexacoordinate Sn(IV) adducts of Ph₂SnCl₂ with disulfoxides of the type (RSOCH₂)₂ (R=Pr, Ph), as well as with 1-methyl-2-(methylsulfinyl) imidazole (ImSOMe), had the sulfur-containing ligand abstracted by Pt(II) to form either S-bonded bridging diplatinum complexes (in the case of the disulfoxides) or an N-bonded species (with ImSOMe), as shown by spectroscopic and structural analysis. The ligand abstraction seems to be a general reaction. Only when the Sn(IV) precursor was changed to the particularly stable MeSnCl₃-ImSOMe complex, in which the tin moiety is strongly acidic, did the reaction not proceed.