François Michaud

Bis(2-meth­oxy­anilinium) hexa­bromido­stannate(IV) dihydrate

The asymmetric unit of the title compound, (C7H10NO)2[SnBr6]·2H2O, contains one cation, one half-dianion and one lattice water molecule. The [SnBr6]2− dianion, located on an inversion center, exhibits a highly distorted octahedral coordination environment, with Sn—Br bond lengths ranging from 2.2426 (9) to 3.0886 (13) Å. In the crystal, O—H⋯Br, N—H⋯Br, N—H⋯O and C—H⋯Br hydrogen bonds consolidate the packing, which can be described as consisting of alternating anionic (containing dianions and lattice water molecules) and cationic layers parallel to ab plane.

2-Meth-oxy-anilinium trichlorido-stannate(II).

The title compound, (C7H10NO)[SnCl3], is a new compound with non-linear optical (NLO) properties. The structure is pseudocentrosymmetric; the absence of an inversion centre was proved by the Kurtz and Perry method showing a significant second harmonic generation (SHG) signal about ten times lower than that from potassium dihydrogenphosphate. The crystal structure exhibits alternating organic and inorganic layers parallel to the ab plane, which are stabilized by intermolecular N—H⋯Cl interactions.

catena-Poly[N,N,N′,N′-tetra­methyl­ethylendi­ammonium [[tetra­bromido­antimonate(III)]-μ-bromido] hemihydrate]

The asymmetric unit of the title compound {(C6H18N2)2[Sb2Br10]·H2O}n, consists of two tetramethylethylendiammonium cations that are located on centres of inversion, as well as one tetramethylethylendiammonium cation, one water molecule, one distorted octahedral [SbBr6]3−anion and one bisphenoidal [SbBr4]− anion in general positions. The [SbBr6]3− and [SbBr4]− anions are linked together by two long Sb—Br bonds of 3.2709 (8) and 3.5447 (7) Å into {[Sb2Br10]4−}n chains along [001]. One of the three tetramethylethylendiammonium cations is disordered and was refined using a split model (occupancy ratio 0.58:0.42). The cations and the water molecule are connected to the {[Sb2Br10]4−}n polymeric anions by weak N—H ⋯Br and O(water)—H ⋯Br hydrogen bonding.

Bis(dimethyl­ammonium) tetra­chlorido­dimethyl­stannate(IV)

Regular crystals of the title compound, (C2H8N)2[Sn(CH3)2Cl4], were obtained by reacting SnMe2Cl2 with (CH3)2NH·HCl in ethanol in a 1:1 ratio. The Sn atom lies on a center of symmetry and is six-coordinated. It has a distorted octahedral SnC2Cl4 environment with the Cl atoms in cis positions. The Cl atoms are connected to dimethylammonium cations through N—H⋯Cl hydrogen bonds, forming an infinite chain extending parallel to [010].

Et4N[NO3(SnClPh3)2(SnPh3NO3)]: a trinuclear organostannate complex and related derivatives

Abstract Four new di- and triorganonitrato stannate complexes and related derivatives have been synthesized and characterized by infrared and Mössbauer spectroscopy. The structure of Et4N[NO3(SnClPh3)2(SnPh3NO3)] (1) has been determined by single-crystal X-ray diffraction analysis. In the trinuclear organostannate complex, each SnIV atom is five-coordinated and adopts a trigonal-bipyramidal trans-OXSnC3 (X=O or Cl) geometry. The overall coordination environment of the SnIV atoms is trans-octahedral for 2 and 3 or cis-trigonal-bipyramidal for 4. In the related derivatives, the NO3- anions behave as monodentate ligands.

Tris(N,N-di­methyl­anilinium) tri-μ-bromido-bis[tribromido­anti­monate(III)]

In the title compound, (C8H12N)3[Sb2Br9], two of the three unique N,N-dimethyanilinium cations exhibit flip–flop disorder with an occupancy ratio of 0.58 (1):0.42 (1). N—H⋯Br hydrogen bonds link the organic cations and bioctahedral face-sharing anions into a three-dimensional network.

Ethyl­enedi­ammonium chloride thio­cyanate

In the ethylenediammonium dication of the title salt, C2H10N2 2+·Cl−·SCN−, the N—C—C—N torsion angle is 72.09 (12)°. In the crystal, an extensive three-dimensional hydrogen-bonding network, formed by N—H⋯Cl and N—H⋯N hydrogen bonds, holds all the ions together.

Bis[2-(5-methyl­sulfanyl-1,3,4-oxadiazol-2-yl-κN3)phenolato-κO1]copper(II)

In the title complex, [Cu(C9H7N2O2S)2], the CuII ion, located on an inversion center, adopts an N2O2 square-planar coordination. The 2-(5-methylsulfanyl-1,3,4-oxadiazol-2-yl)phenolate ligand is chelated to the central CuII ion in an N,O-bidentate manner.