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Abstract: Nine triorganotin(IV) complexes of the type R3SnL (L=L1 R=Me 1, Ph 2, PhCH2 3; L=L2 R=Me 4, Ph 5, PhCH2 6; L=L2 R=Me 7, Ph 8, PhCH2 9) have been obtained by reaction of new Schiff base HL1, HL2 or HL3 with triorganotin(IV) chloride in the presence of sodium ethoxide. All the complexes 1–9 were characterized by elemental, IR and NMR spectra analyses. Except for complexes 3, 4, 6, 9, the others were also characterized by X-ray crystallography diffraction analyses, which revealed that complexes 1, 2, 5, 7, 8 were four coordinated and displayed a capped tetrahedron. [Copyright &y& Elsevier]

Abstract: A new macrocycle dimethyltin(IV) complex 1 has been synthesized by the reaction of 5-phenyl-1,3,4-oxadiazole-2-thiol with dimethyltin dichloride in the presence of sodium ethoxide. The complex 1 has been characterized by elemental, IR, 1H, 13C, 119Sn NMR spectra and X-ray crystallography diffraction analyses. X-ray data reveal that a 24-membered macrocycle associated by intermolecular CO non-bonded weak interactions. The geometry about each tin atom involved is distorted trigonal bipyramidal. [Copyright &y& Elsevier]

Abstract: A novel cyclic dimethyltin complex [Me2Sn(2,6-pdc)]3 (1) (2,6-pdc=2,6-pyridinedicarboxylate) was synthesized by the reaction of dimethyltin (IV) dichloride and 2,6-pyridinedicarboxylate acid in methanol under solvothermal conditions (150°C). However, under room temperature (25°C), we obtained a ladder complex [Me2Sn(2,6-pdc)]2(MeOH)2 (2). Characterization of complexes 1 and 2 was achieved using elemental analysis, IR, 1H, 13C and 119Sn NMR spectra and X-ray diffraction. X-ray data of 1 revealed that it was an unusual cyclic complex with a discrete cyclotrinuclear unit, in which the 12-membered cyclic cavity is almost completely planar. X-ray data of 2 showed that it was a ladder complex, in which a crystallizing methanol molecule is found in each formula unit. [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]

Three novel macrocyclic diorganotin(IV) compounds of the type: {[R10(SnO)3(SnOH)2]HnXOm}2 · L (n=1, m=4, R=PhCH2, X=P, L=0, 1; n=0, m=4, R=PhCH2, X=S, L=4H2O, 2; n=0, m=3, R=n-Bu, X=N, L=0, 3) were synthesized by the reaction of (PhCH2)2SnCl2 with Na2HnXO4 (n=1, X=P; n=0, X=S) or (n-Bu)2SnCl2 with NaNO3. All the compounds 1, 2 and 3 are characterized by elemental, IR and X-ray diffraction analyses. X-ray data reveal that a macrocyclic structure with two centrosymmetric ladders of hydrolysis exists in the crystals of the three compounds. The geometry about each tin atom involved is trigonal bipyramidal. [Copyright &y& Elsevier]

Triphenyl(6-thiopurinyl)tin has been prepared and its structure reinvestigated by X-ray diffraction. In the structure, a new coordination mode was observed that was different from those reported previously from investigations by infrared and Mössbauer spectroscopy. In the molecule, 6-thiopurine coordinated to tin by the S and N(1) atoms. The discrete molecules were connected to form a zigzag 1D network through intermolecular H⋯N hydrogen bonds. The tin environment is pentacoordinated with cis-trigonal bipyramidal geometry. [Copyright &y& Elsevier]