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Abstract: A series of new organotin(IV) derivatives with 2,3,4,5-tetrafluorobenzoic acid: {[(2,3,4,5-F4C6HCO2)R2Sn]2O}2 (R=Et 1, n-Bu 2, Ph 3), [R2Sn(O2CC6F4H)2] n (R= n-Bu 4, Et 5, Ph 6), and Sn2R4(O2CC6F4H)3(OH) (R=Et 7, n-Bu 8, Ph 9), were synthesized by the reaction of diorganotin oxide and 2,3,4,5-tetrafluorobenzoic acid. All the complexes 1-9 have been characterized by elemental analysis, IR, 1H, 13C, 119Sn NMR spectra. Among them complexes 2, 4, 8 were also characterized by X-ray crystallography diffraction analyses. The crystal structure of complex 2 exhibited a tetra-nuclear geometry with the Sn2O2 symmetry core. Complex 4 formed a 1D helical double-chain structure through intermolecular O→Sn coordinating and completed a DNA-like assembly. Complex 8 revealed that the both Sn atoms were held together by hydroxide and acetate bridges, forming a chair-like six-membered ring. Moreover, the supramolecular structures of dimer, 1D chain or 2D network have been found in complexes 4 and 8 by intermolecular C–H⋯F weak hydrogen bond and non-bonded F⋯F or F⋯Sn interaction, which were highly effective in the assembly of supramolecular structures and could lead to the formation of complexes with fascinating topologies properties. [Copyright &y& Elsevier]

Abstract: A series of new triorganotin(IV) complexes with 4-hydroxy-2-mercapto-6-methylpyrimidine (L1H2), 4-hydroxy-2-mercapto-pyrimidine (L2H2), 2,4(1H,3H)-pyrimidinedithione (L3H2) () of the type R3SnLSnR3 (R=Me 1, 4, 7; R=Ph 2, 5, 8; R=PhCH2 3, 6, 9) have been synthesized by reactions of triorganotin(IV) chloride and corresponding ligands. All complexes are characterized by elemental analyses, IR spectra and NMR spectra analyses. Among them, complexes 2, 5 and 8 are also characterized by X-ray crystallography diffraction analyses. Significant π⋯π stacking, C–H⋯π interactions and intramolecular hydrogen bonds stabilize these structures. [Copyright &y& Elsevier]