Aminata Diasse-Sarr

X-RAY STRUCTURE OF (SnMe3)SeO3 [SnMe3(H2O)]

The structure of (SnMe3)2Se03.H20 has been determined by an x-ray study. One tin atom forms part of a polymeric chain linked by O, O-bridging selenite ligands. A second Me3Sn moiety is pendant to this chain via the remaining selenite oxygen atom, and which also adopts a trigonal bipyramidal stereochemistry at tin through co-ordination of a water molecule. Hydrogen bonding links the polymeric chains into a three-dimensional network.

Crystal structure of bis­(cyclo­hexyl­ammonium) di­phenyl­dioxalatostannate(IV)

In the title salt, (CyNH3)2[Sn(Ph2)(C2O4)2] (Cy is cyclohexyl and Ph is phenyl), the SnPh2 moiety is chelated by two oxalate anions, leading to a cis arrangement within the distorted octahedral coordination sphere of the SnIV atom.

Crystal structure of the bis-(cyclo-hexyl-ammonium) succinate succinic acid salt adduct.

The title salt adduct comprises two cyclohexylammonium cations, one succinate anion and one molecule of succinic acid, linked together through intermolecular hydrogen-bonding interactions giving a two-dimensional layer-like self-assembly lying parallel to (010).

Tris(cyclo­hexyl­ammonium) cis-di­chlorido­bis­(oxalato-κ2O1,O2)stann­ate(IV) chloride monohydrate

The crystal structure of the title compound, (C6H14N)3[Sn(C2O4)2Cl2]Cl·H2O, contains three cyclohexylammonium cations, one stannate(IV) dianion, one isolated chloride anion and one lattice water molecule. The cyclohexylammonium cations adopt chair conformations. In the complex anion, two bidentate oxalate ligands and two chloride anions in cis positions coordinate octahedrally to the central SnIV atom. The cohesion of the molecular entities is ensured by the formation of N—H⋯O, O—H⋯O, O—H⋯Cl and N—H⋯Cl interactions involving cations, anions and the lattice water molecule, giving rise to a layer-like arrangement parallel to (010).

Diisopropyl­ammonium hydrogen phenyl­phospho­nate

In the title salt, [(CH3)2CH]2NH2]+·[C6H5PO2(OH)]−, the anions are linked by pairs of O—H⋯O hydrogen bonds, forming inversion dimers. These dimers are bridged by the cations via N—H⋯O hydrogen bonds, leading to a three-dimensional structure.

Bis(cyclo-hexyl-ammonium) tetra-chlorido-diphenyl-stannate(IV).

The title compound, (C6H14N)2[Sn(C6H5)2Cl4], contains cyclohexylammonium cations in general positions and a stannate(IV) anion that is located on a twofold rotation axis. The SnIV atom in the complex anion is surrounded by four Cl− ligands and two trans-phenyl groups in a distorted octahedral configuration. The anions are connected with the cations through N—H⋯Cl hydrogen bonds. Every cation is involved in three N—H⋯Cl bonds to the chloride ligands of three different anions, and each chloride ligand is linked to two cations. This arrangement leads to a layered structure parallel to (010).

Bis(cyclo­hexyl­ammonium) tetra­chlorido­(oxalato)stannate(IV)

The title salt, (C6H14N)2[Sn(C2O4)Cl4], was obtained as a by-product from the reaction between 2C6H14N+·C2O4 2−·1.5H2O and SnCl2·2H2O. The cyclohexylammonium cation has a chair conformation. The complex anion consists of an oxalate anion chelating the SnCl4 moiety, resulting in a distorted octahedral coordination sphere of the SnIV atom with the O atoms in equatorial cis positions. In the crystal, cations and anions are linked through N—H⋯O and N—H⋯Cl interactions into a layered arrangement parallel to (100).

Poly[diaqua-(μ(4)-carboxyl-atomethyl-phospho-nato)(μ(4)-carb-oxy-methyl-phospho-nato)penta-deca-methyl-penta-tin(IV)].

The central SnIV atom of the pentanuclear title complex, {[Sn(CH3)3]3O2C(CH2)PO3[Sn(CH3)3(H2O)]2HO2C(CH2)PO3}, is located on a twofold rotation axis; due to symmetry, the H atom of the carboxyl group of the anion is disordered with a site occupancy of 0.5. The central SnIV atom is bonded to three methyl groups (one of which is disordered about the twofold rotation axis) and is symmetrically trans coordinated by two phosphonate groups with Sn—O = 2.2665 (12) Å while the other SnMe3 residues are asymmetrically trans coordinated with Sn—O = 2.1587 (12) and 2.3756 (13) Å for one residue and Sn—O = 2.1522 (12) and 2.4335 (12) Å for the other; the Sn–O distances involving two O atoms trans to carboxylate are longer than those trans to phosphonate groups. The Sn—C distances lie in a very narrow range [2.112 (2)–2.133 (3) Å]. The oxyanion behaves as a tetra-coordinating ligand. The bridging mode of the latter leads to the formation of layers parallel to (001) that are interconnected by O—H⋯O and C—H⋯O hydrogen bonds.

catena-Poly[bis­(dibenzyl­ammonium) [[dichloridomercurate(II)]-μ-sulfato-κ2O:O′]]

The structure of the title compound, (C14H16N)2[HgCl2(SO4)], consists of an infinite chain propagating along the c direction, containing HgII ions tetracoordinated by two bridging O atoms of bis-monodentate sulfate anions and two chloride ligands. In the the crystal, N—H⋯O hydrogen bonding between the cations and the anionic chains consolidates the packing. The crystal structure was determined from an inversion twin with approximately equal twin domains.

Bis(1,1-dimethyl­guanidinium) tetra­aqua­dimethyl­tin(IV) bis­(sulfate)

Single crystals of the title salt, (C3H10N3)2[Sn(CH3)2(H2O)4](SO4)2, formed concomitantly with the already known [Sn(CH3)3]2SO4·2H2O. In the title structure, the SnIV atom displays a slightly distorted octahedral coordination geometry defined by four O water atoms in the equatorial positions and two methyl groups in the axial positions. In the crystal, various O—H⋯O and N—H⋯O hydrogen-bonding interactions between the organic cation and the coordinated water molecules as donors and the sulfate O atoms as acceptors result in a three-dimensional structure. The SnIV atom is located on an inversion centre, resulting in half of the complex metal cation being in the asymmetric unit.