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Four new triorganotin(IV) complexes, [RSn(OSeCH-4-Et)] (R = Me 1), [RSn(OSeCH-4-Et)] (R = Ph 2), [RSn(OSeCH-2-Et)] (R = Me 3; Ph 4) have been synthesized by the treatment of 4-ethylbenzeneseleninic acid, 2-ethylbenzeneseleninic acid, and the corresponding triorganotin(IV) chloride with sodium ethoxide in methanol. All of the complexes were characterized by elemental analysis, FT-IR, NMR (H, C, and Sn) spectroscopy, TGA, and X-ray crystallography. Crystal structures show that all of the complexes are generated by the bidentate oxygen atoms and the five-coordinated tin centers with trigonal bipyramid geometry. The structural analyses reveal that complex 1 has a centrosymmetric tetranuclear triorganotin selenite with 16-membered macrocycle, which is formed by trimethyltin and ligand alternate linking. A series of C-H···O and π- π stacking interactions in complex 1 play an important function in the supramolecular aggregation. Complex 3 has two 1D spring-like chiral helical chains and crystallizes in the monoclinic space group P2, which is chiral. Complex 2 and 4 are both 1D infinite neutral chain polymers and complex 2 forms a 2D supramolecular framework through intermolecular C-H···O interactions. [ABSTRACT FROM AUTHOR]

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]

novel 3D tri- n-butyltin complex [( n-BuSn)(CHNSCO)] ( 1) has been solvothermally synthesized and structurally characterized by elemental analysis, FT-IR, NMR (H, C, and Sn) spectra and X-ray crystallography. X-ray data of complex 1 reveals that it is a 3D tri- n-butyltin coordination polymer with a metal-organic framework (MOF) structure , significant N → Sn interactions plays an important role in the construction of this structure. [ABSTRACT FROM AUTHOR]