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Tetra-kis(N,N-diethyl-carbamato)titanium(IV).

ABSTRACT: The mononuclear title compound, [Ti(C(5)H(10)NO(2))(4)], is a rare example of an eight-coordinate Ti(IV) compound in which all donor atoms are O atoms. The coordination geometry around Ti(IV) is pseudo-dodeca-hedral and the O-C-O angles of the carbamate ligands are slightly compressed [range 115.3 (2)-116.7 (2)°], apparently on account of the high coordination number. One ethyl group is disordered over two positions; the site occupancy factors are 0.64 and 0.36.

SUBMITTER: Straessler NA

PROVIDER: S-EPMC2914932 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Redetermination of tetra-kis(N,N-diethyl-dithio-carbamato)tin(IV).

Project description:The crystal structure of the title compound, [Sn(C(5)H(10)NS(2))(4)], was originally determined by Harreld & Schlemper [Acta Cryst. (1971), B27, 1964-1969] using intensity data estimated from Weissenberg films. In comparison with the previous refinement, the current redetermination reveals anisotropic displacement parameters for all non-H atoms, localization of the H atoms, and higher precision of lattice parameters and inter-atomic distances. The complex features a distorted S(6) octa-hedral coordination geometry for tin and a cis disposition of the monodentate dithio-carbamate ligands.

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Tetra-kis(diethyl ether)tetra-?(4)-oxido-octa-kis-(penta-fluoro-phen-yl)octa-zinc.

Project description:Mol-ecules of the title compound, [Zn(8)(C(6)F(5))(8)O(4)(C(4)H(10)O)(4)], are located on a special position of site symmetry [Formula: see text]. As a result, there is just one quarter-mol-ecule in the asymmetric unit. The title compound features a Zn(4)O(4) cube. Each Zn atom in the cube carries a pentafluorophenyl substituent. Each O atom is bonded to a further Zn atom, which is connected to a pentafluorophenyl substituent and the O atom of a diethyl ether mol-ecule. All ether C atoms are disordered over two sets of sites with a site occupation factor of 0.51?(2) for the major occupied site.

| S-EPMC3201485 | biostudies-literature

Disodium tricopper(II) tetra-kis[selenate(IV)] tetra-hydrate.

Project description:The title compound, Na(2)Cu(3)(SeO(3))(4)(H(2)O)(4), has been prepared under hydro-thermal conditions. The crystal structure contains a three-dimensional anionic framework made up from distorted [CuO(4)(H(2)O)(2)] octa-hedra ( symmetry), [CuO(4)(H(2)O)] square pyramids and trigonal-pyramidal SeO(3) units sharing common corners. The connectivity among these units leads to four- and eight-membered polyhedral rings, which by edge-sharing inter-connect into walls. A rhombus-like 16-membered polyhedral ring channel system with a longest length of approximately 14.0 Å and a shortest length of 5.3 Å is enclosed by such walls along the a axis. The water mol-ecules attached to the Cu atoms, as well as the electron lone pairs of the Se(IV) atoms, protrude into these channels. The seven-coordinated Na(+) counter-cations occupy the remaining free space of the 16-membered polyhedral ring channels. An intricate network of O-H⋯O hydrogen bonds further consolidates the three-dimensional structure.

| S-EPMC2959769 | biostudies-literature

Tetra-kis(di-cyclo-hexyl-amido)-zirconium(IV).

Project description:The reaction of ZrCl4 with three equivalents of LiNCy2 (Cy is cyclo-hex-yl) resulted in the formation of tris-(di-cyclo-hexyl-amido)-zirconium chloride and the title compound, [Zr(C12H22N)4]. The latter is isotypic with its cerium(IV) analogue and crystallizes with three independent mol-ecules in the asymmetric unit. One mol-ecule is located about a twofold rotation axis, and the other two on fourfold inversion axes. In each mol-ecule, the ZrIV atom has a distorted tetra-hedral coordination environment. The crystal under investigation was twinned by inversion in a 1:1 ratio.

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Tetra-kis[?-4-(diethyl-amino)-benzoato-?O:O']bis-[(N,N-diethyl-nicotinamide-?N)cobalt(II)].

Project description:In the centrosymmetric binuclear title complex, [Co(2)(C(11)H(14)NO(2))(4)(C(10)H(14)N(2)O)(2)], the two Co(II) cations [Co?Co = 2.6199?(5)?Å] are bridged by four 4-(diethyl-amino)-benzoate (DEAB) anions. The four nearest O atoms around each Co(II) ion form a distorted square-planar arrangement, the distorted square-pyramidal coordination geometry being completed by the pyridine N atom of an N,N-diethyl-nicotinamide (DENA) ligand. The dihedral angle between the benzene ring and the carboxyl-ate group is 7.06?(11)° in one of the independent DEAB ligands and 4.42?(9)° in the other. The benzene rings of the two independent DEAB ligands are oriented at a dihedral angle of 86.35?(8)°. The pyridine ring is oriented at dihedral angles of 31.43?(6) and 57.92?(7)° with respect to the two benzene rings. In the crystal, weak inter-molecular C-H?O inter-actions link the mol-ecules into a three-dimensional network. Weak C-H?? inter-actions are also present in the crystal structure.

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Bis(4-chloro-benzyl-ammonium) tetra-kis(2,6-diethyl-anilinium) cyclo-hexa-phosphate tetra-hydrate.

Project description:In the crystal of the title hydrated mol-ecular salt, 2C(7)H(9)ClN(+)·4C(10)H(16)N(+)·P(6)O(18) (6-)·4H(2)O, the packing consists of a three-dimensional O-H?O and N-H?O hydrogen-bonded network resulting from the association of anionic layers built up from centrosymmetric cyclohexaphosphate ions and water mol-ecules and the two types of organic cations.

| S-EPMC2968505 | biostudies-literature

Tetra-kis(1,3-diphenyl-propane-1,3-dionato)hafnium(IV).

Project description:In the title compound, [Hf(C(15)H(11)O(2))(4)], the Hf(IV) atom is coordinated by four 1,3-diphenyl-propane-1,3-dionato ligands with an average Hf-O distance of 2.17 (3) Å and O-Hf-O bite angles varying from 74.5 (1) to 75.02 (9)°. The coordination polyhedron shows a slightly distorted Archimedean square-anti-prismatic geometry. The crystal packing is stabilized by weak C-H⋯O inter-actions.

| S-EPMC3008122 | biostudies-literature

Tetra-kis(4-methyl-2-thien-yl)tin(IV).

Project description:The mol-ecule of the title compound, [Sn(C(5)H(5)S)(4)], lies on a special position of site symmetry. The Sn(IV) atom shows a slightly distorted tetra-hedral coordination.

| S-EPMC2959511 | biostudies-literature

Poly[tetra-butyl-tetra-kis-(μ(2)-hydrogen phenyl-phospho-nato)ditin(IV)].

Project description:In the title compound, [Sn(2)(C(4)H(9))(4)(C(6)H(6)PO(3))(4)](n), the basic unit is a dimer containing two symmetry-related Sn(IV) atoms bridged by two hydrogenphenylphosphonate anions. This fragment is located about an inversion center, and each Sn(IV) atom is linked to two other hydrogenphenylphosphonate anions, giving a layered structure parallel to (010). The coordination geometry for the Sn(IV) atoms is close to octa-hedral. The layers are connected via O-H⋯O hydrogen bonds, generating a three-dimensional network. One butyl group is disordered over two sets of sites, with occupancies of 0.49 (2) and 0.51 (2).

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Tetra-kis(4-chloro-anilinium) hexa-chlorido-stannate(IV) dichloride.

Project description:The asymmetric unit of the title compound, (C(6)H(7)ClN)(4)[SnCl(6)]Cl(2), comprises two 4-chloro-anilinium cations, half of an [SnCl(6)](2-) anion and a Cl(-) anion. The Sn(IV) atom, located on a special position on a twofold rotation axis, exhibits an octa-hedral environment. In the crystal, mol-ecules are linked by N-H?Cl hydrogen bonds between the 4-chloro-anilinium cations, [SnCl(6)](2-) anions and Cl(-) anions.

| S-EPMC3379112 | biostudies-literature

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