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Abstract: Three new diorganotin(IV) complexes, [Bu2Sn(O2SeC6H5)2] n (1), [Bu2Sn(O2SeC6H4Me)2] n (2), [Me2Sn(O2SeC6H4Bu)2] n (3) have been synthesized by the reaction of benzeneseleninic acid, p-tolueneseleninic acid, and 4-tert-butylbenzeneseleninic acid with Me2SnCl2 or Bu2SnCl2 in the presence of sodium ethoxide in methanol at 50°C. All of the complexes were characterized by elemental analysis, FT-IR, NMR (1H, 13C and 119Sn) spectroscopy and X-ray crystallography. X-ray diffraction studies of 1, 2, 3 show that the areneseleninate groups behave as double bridges between the tin atoms leading to polymeric chain structure with Sn2O4Se2 eight-membered ring. The organic groups bonded to the tin atoms are in trans-position in the resulting octahedral arrangement. [Copyright &y& Elsevier]

Abstract: Six new triorganotin(IV) complexes, [R3Sn(O2SeC6H4Cl)] n (R=Me 1; Ph 2), [R3Sn(O2SeC6H4Me)] n (R=Me 3; Ph 4), [R3Sn(O2SeC6H4Bu)] n (R=Me 5; Ph 6) have been synthesized by the reaction of 4-chlorobenzeneseleninic acid, p-Tolueneseleninic acid, and 4-tert-butylbenzeneseleninic acid with triorganotin(IV) chloride in the presence of sodium ethoxide. All of the complexes were characterized by elemental analysis, FT-IR, NMR (1H, 13C, and 119Sn) spectroscopy, and X-ray crystallography. Crystal structures show that all of the complexes exhibit 1D infinite chain structures which are generated by the bidentate oxygen atoms and the five-coordinated tin centers. [Copyright &y& Elsevier]

Three types of di- and trimethyltin(IV) polymers [MeSn(CHNO)] · 4HO 1, [(MeSn)(CHNO)] · HO 2 and [(MeSn)(CHNO)] · CHOH 3 have been synthesized by the reaction of trimethyltin chloride with benzimidazole-5,6-dicarboxylic acid under three different experimental conditions. All the complexes were characterized by elemental analysis, IR, NMR (H, C, Sn) spectroscopy and X-ray crystallography diffraction analysis. The structure analyses reveal that complex 1 has a 1D helical chain in which benzimidazole-5,6-dicarboxylic acid act as a tetradentate ( O, O-chelation) ligand coordinating to dimethyltin (IV) ions, two water molecules take part in the coordination giving seven-coordinated tin centers in the component. Complex 2 and 3 are 2D and 3D corrugated polymers in which the deprotoned acid as tetradentate ligand affords by three oxygen atoms and a nitrogen atom. [ABSTRACT FROM AUTHOR]

Abstract: 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. [Copyright &y& Elsevier]

Abstract: A series of diorganotin (IV) complexes of the types of R2SnCl(SSCC3H3N2) (R=CH3 1, n Bu 2, C6H5 3 and C6H5CH2 4), R2Sn(SSCC3H3N2)2 (R=CH3 5, n Bu 6, C6H5 7 and C6H5CH2 8) and R2Sn(SSCC3H2N2) (R=CH3 9, n Bu 10, C6H5 11 and C6H5CH2 12) have been obtained by reactions of 4(5)-imidazoledithiocarboxylic acid with diorganotin (IV) dichlorides in the presence of sodium ethoxide. All complexes are characterized by elemental, IR, 1H, 13C and 119Sn NMR spectra analyses. Also, the complexes 1, 7 and 9 are characterized by X-ray crystallography diffraction analyses, which reveal that the complex 1 is monomeric structure with five-coordinate tin (IV) atom, the complex 7 is monomeric structure with six-coordinate tin (IV) atom and the complex 9 is one-dimensional chain with five-coordinate tin (IV) atom. [Copyright &y& Elsevier]

The 18-membered stereoregular diphenyltin macrocycles: {Ph2Sn[S(C6H3NO)O]}3 (8), {Ph2Sn[S(C6H3NO)O]}3·2.67H2O (9) and {Ph2Sn[S(C6H3NO)O]}3·4C6H6 (10) have been synthesized by the reaction of diphenyltin dichloride with 2-mercaptonicotinic acid. The three complexes were characterized by elemental, IR, 1H-NMR analyses. The X-ray crystallography analyses of 9 and 10 were also given. Single crystal X-ray diffraction data reveal that both 9 and 10 are highly symmetrical tri-nuclear cyclic complexes with the ligand 2-mercaptonicotinic acid bridging the adjacent tin atoms. The tin environment is distorted cis-trigonal bipyramid. Weak interaction Sn⋯O was recognized between tin and exocyclic-oxygen atoms. The potential tridentate of endocyclic sulfur atoms make them interesting ligands. [Copyright &y& Elsevier]