Syntheses and crystal structures of di- and trimethyltin (IV) derivatives with phenylphosphonic acid

Three types of methyltin phosphonates, {[(CH3)3Sn]4(O3PPh)2}n (1), {[(CH3)3Sn]2(O3PPh) · CH3OH}n (2) and {[(CH3)2SnO3PPh]4}n (3) were synthesized by the reaction of phenylphonic acid with trimethyltin (IV) chloride and dimethyltin (IV) dichloride, respectively. Complexes 1, 2 and 3 were characterized by elemental analysis, IR, NMR (1H, 13C, 31P and 119Sn) spectroscopy, TGA and X-ray crystallography diffraction analysis. The X-ray analysis of complex 1 shows that the structure is a polymeric infinite 1D zigzag chain. In complex 2, the oxygen atom of methanol molecule is coordinated to the tin atoms, and a 2D network is generated via O–H⋯O hydrogen bonds. In complex 3, a novel 2D network containing 12-membered (Sn3O6P3) rings is formed.