Low-temperature redetermination of tribenzyl-chloridotin(IV).
ABSTRACT: Compared to the previous studies [Ng (1997 ?). Acta Cryst. C53, 56-58; Yin et al. (2005 ?). Huaxue Shiji, 27, 295-296], the redetermined structure of the title compound, [Sn(C(7)H(7))(3)Cl], exhibits a doubled c unit-cell parameter. There are two mol-ecules in the asymmetric unit, with both Sn and both Cl atoms having 3 site symmetry. The Sn atoms have distorted SnClC(3) tetra-hedral geometries and the mol-ecules inter-act by way of short Sn?Cl bridges [Sn?Cl = 3.418?(2) and 3.475?(2)?Å], thereby forming chains propagating in c.
Project description:The Sn(IV) atom in the title diorganotin dithio-carbamate, [Sn(C(4)H(9))(2)Cl(C(10)H(12)NS(2))], is penta-coordinated by an asymmetrically coordinating dithio-carbamate ligand, a Cl and two C atoms of the Sn-bound tert-butyl groups. The resulting C(2)ClS(2) donor set defines a coordination geometry inter-mediate between square pyramidal and trigonal bipyramidal with a slight tendency towards the former. In the crystal structure, C-H?? contacts link centrosymmetrically related mol-ecules into dimeric aggregates.
Project description:The title compound, [SnCl(4)(C(10)H(8)N(2)Se)], was obtained by the reaction of 2,2'-dipyridyl diselenide with tin tetra-chloride. The Sn(IV) ion is coordinated by two N atoms [Sn-N = 2.266?(2) and 2.274?(2)?Å] from the bis-(2-pyrid-yl)selenide ligand and four chloride anions [Sn-Cl = 2.3717?(6)-2.3939?(6)?Å] in a distorted octa-hedral geometry. The central six-membered chelate ring has a boat conformation with the Se and Sn atoms deviating by 0.692?(3) and 0.855?(3)?Å, respectively, from the mean plane through the remaining four ring atoms. The pyridine rings are inclined to each other by a dihedral angle of 49.62?(8)°. The crystal packing exhibits short inter-molecular Se?Cl contacts [3.5417?(7) and 3.5648?(7)?Å], weak C-H?Cl hydrogen bonds and ?-? stacking inter-actions between the pyridine rings with a centroid-centroid distance of 3.683?(3)?Å.
Project description:The title compound, [Sn(2)(C(6)H(5))(6)(C(7)H(4)O(4)S)], contains two molecules with similar conformations in the asymmetric unit. In each mol-ecule, the Sn atoms adopt a distorted tetra-hedral geometry arising from three C atoms of three phenyl rings and one O atom from the bridging 3-thienylmalonato ligand. The mol-ecules lie about inversion centers with the ligands facing each other, with C?O distances of 3.417?(10) and 3.475?(10)?Å.
Project description:In the title 1:2 adduct, [SnCl(4)(H(2)O)(2)]·2C(6)H(14)O(3), the Sn(IV) atom (site symmetry 2) adopts a cis-SnO(2)Cl(4) octa-hedral geometry. In the crystal structure, O-H?O hydrogen bonds lead to associations of one metal complex and two diglyme mol-ecules.
Project description:The 4-nitro-cinnamate anion in the title compound, [Sn(C(7)H(7))(3)(C(9)H(6)NO(4))](n), bridges adjacent tribenzyl-tin cations into a helical chain running along the b axis. The Sn atoms in the two independent mol-ecules adopt distorted trans-C(3)SnO(2) trigonal-bipyramidal geometries. The repeat distance of the polymeric chain is b/2.
Project description:The title compound, [Sn(CH3)2Cl2(CH4N2S)2], crystallizes with two half-mol-ecules in the asymmetric unit. Both mol-ecules are completed by inversion symmetry with the two Sn(IV) atoms located on inversion centers. The metal atoms have distorted octa-hedral coordination environments defined by two Cl atoms, two C atoms of methyl groups and two thio-urea S atoms. In the crystal, mol-ecules are linked via N-H?Cl and N-H?S hydrogen bonds, forming a three-dimensional structure.
Project description:The structure of the title compound, [Sn(2)Cl(4)(C(2)H(6)OS)(4)], contains dimers formed through weak Sn?Cl [3.691?(2)?Å] inter-actions, resulting in a planar Sn(2)Cl(2) core with an inversion center at the centre of the four-membered ring. The Sn(II) atoms are penta-coordinated and have a distorted octa-hedral ?-SnCl(3)O(2) coordination geometry. The O atoms from the dimethyl sulfoxide mol-ecules occupy trans positions, while the Cl atoms exhibit a meridional arrangement.
Project description:The title compound, [Sn(C(4)H(9))(2)(C(5)H(8)NS(2))Cl], contains two mol-ecules in the asymmetric unit, with similar conformations. In both mol-ecules, the Sn atom adopts a distorted trigonal-bipyramidal geometry arising from two C atoms, one Cl atom and two S atoms from the bidentate dithio-carbamate ligand, with one Sn-S bond much longer than the other. One C atom of the pyrrolidine ring is disordered equally over two sites.
Project description:The structure of the title compound, [Sn(2)Br(1.97)Cl(4.03)(OH)(2)(H(2)O)(2)]·2C(3)H(6)O, contains two hexa-coordinated Sn atoms bridged symmetrically by two hydroxide groups, with an inversion center in the middle of the planar Sn(2)O(2) ring, half of the mol-ecule being generated by inversion symmetry. The other sites of the distorted octa-hedral coordination geometry are occupied by halide atoms and water mol-ecules. The structure exhibits substitutional disorder of the halide atoms bonded to the Sn atom, with 0.672?(4) occupancy for Cl and 0.328?(4) for Br for each halide position. The compound crystallizes with two acetone mol-ecules, which are involved in intra- and inter-molecular O-H?O contacts. The water mol-ecules coordinated to the Sn atoms are also involved in O-H?O and O-H?X contacts, leading to a polymeric array along the a axis.
Project description:The six-coordinate Sn(IV) atom in the title compound, [Sn(C(7)H(6)F)(2)Cl(2)(C(10)H(8)N(2))], shows a trans-C(2)SnN(2)Cl(2) octa-hedral coordination [C-Sn-C = 174.81?(10) and 176.71?(9)° in the two independent mol-ecules in the asymmetric unit]; the Cl atoms are cis to each other as are the N atoms of the chelating N-heterocycle.