Mamadou Sidibe

Organotin phosphinates and arseniates R(2)SnA(2), R2Sn(Cl)A, Me3Sn(O2PPh2) (R = Me, Bu; A = Me2AsO2, Ph2PO2): Synthesis, IR, Raman, Mossbauer and NMR studies

Derivatives of general formulae R(2)SnA(2), R2Sn(Cl)A and Me3Sn(O2PPh2) (R = Me, Bu; A = Me2AsO2, Ph2PO2) have been synthesized and their elemental analyses performed. From the spectroscopic data (i. r., Raman, Mossbauer and NMR) polymeric structures containing symmetrically or unsymmetrically octahedral trans coordinated SnR2 residue and an infinite chain with a trigonal bipyramidal environment around the tin center for Me3Sn(O2PPh2) have been suggested.

CRYSTAL STRUCTURE OF BIS-(AQUATRIMETHYLSTANNYL)OXALATE [Me3Sn(H2O)]2C2O4

The structure of bis-(aquatrimethylstannyl)oxalate has been determined and found to contain metal atoms in a trans-02SnC3 environment. Each tin atom is bonded axially by one water and a monodentate oxalate, while the lattice structure is dominated by hydrogen bonds rather than intermolecular carboxylate bridges.

Crystal structure of bis­(diiso­propyl­ammonium) cis-di­iodido­bis­(oxolato-κ2O1,O2)stannate(IV)

The packing of the title molecular salt features N—H⋯O and bifurcated N—H⋯(O,O) hydrogen bonds, which generate [10-1] chains.

Benzyl­triphenyl­phospho­nium dichlorido­triphenyl­stannate(IV)

The crystal structure of the title salt, (C25H22P)[Sn(C6H5)3Cl2] or (PhCH2PPh3)[SnPh3Cl2], consists of [PhCH2PPh3]+ cations and [SnPh3Cl2]− anions in which the SnIV atom is linked to two Cl atoms and three phenyl groups in a trigonal–bipyramidal geometry, with the Cl atoms in trans positions. The cation adopts a tetrahedral geometry. In the crystal, the cations and the anions are connected by C—H⋯Cl hydrogen bonds, leading to an infinite chain propagating along the c direction.

Poly[tetra­butyl­ammonium [chlorido­hexa­methyl-μ3-sulfato-distannate(IV)]]

In the structure of the title coordination polymer, {(C16H36N)[Sn2(CH3)6Cl(SO4)]}n, the two independent SnIV atoms are coordinated in a trigonal–bipyramidal manner by three methyl groups in the equatorial plane and in the axial positions by either two O atoms of bridging SO4 2− anions or by a Cl atom and one O atom of a bridging SO4 2− anion, respectively. The [Sn2(CH3)6Cl(SO4)]− anion forms an infinite zigzag chain parallel to the c axis. The cations are situated between these chains. Two of the four butyl groups of the cation are partially disordered over two sets of sites with site occupancies of 0.79 (2):0.21 (2) and 0.75 (2):0.25 (2), respectively. Weak C—H⋯O hydrogen-bonding interactions help to consolidate the crystal packing.