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Tris(2,2'-bipyridine)-cobalt(II) μ(6)-oxido-dodeca-μ(2)-oxido-hexa-oxidohexa-molydate(VI).

ABSTRACT: In the title compound, [Co(C(10)H(8)N(2))(3)][Mo(6)O(19)], the Co(2+) cation is surrounded in a distorted octa-hedral coordination by six N atoms from three 2,2'-bipyridine ligands. The distribution of Mo-O bond lengths in the Lindqvist isopolyanion is consistent with other structures containing the same unit. In the crystal, the cations and anions are linked by C-H⋯O inter-actions.

SUBMITTER: Liu Y

PROVIDER: S-EPMC3006945 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Tris(4,4'-di-tert-butyl-2,2'-bipyridine-?N,N')molybdenum(II) ?(6)-oxido-dodeca-?(2)-oxido-hexa-oxidohexa-molybdate(VI) acetonitrile tetra-solvate.

Project description:The asymmetric unit of the title compound, [Mo(C(18)H(24)N(2))(3)][Mo(6)O(19)]·4CH(3)CN, comprises an [Mo(di-t-Bu-bipy)(3)](2+) cation (di-t-Bu-bipy is 4,4'-di-tert-butyl-2,2'-bipyridine), two halves of Lindqvist-type [Mo(6)O(19)](2-) anions (with each anion completed by the application of a center of inversion) and four acetonitrile solvent mol-ecules. The geometry around the metal atom of the cation resembles a distorted octa-hedron, with each of the three di-t-Bu-bipy ligands being almost planar [deviation from planarity < 6.3?(2)°]. Supra-molecular inter-actions, namely Mo=O??, C N??, C-H?O and C-H?N, along with electrostatic forces, mediate the crystal packing. Two of the tert-butyl groups are affected by rotational disorder which was modeled over two distinct positions with major site occupancies of 0.707?(9) and 0.769?(8).

| S-EPMC3238728 | biostudies-literature

Tris(morpholinium) hexa-?(3)-hydroxido-hexa-?(2)-oxido-dodeca-oxidohexa-molybdenum(VI)chromate(III) tetra-hydrate.

Project description:In the title organic-inorganic hybrid compound, (C(4)H(10)NO)(3)[H(6)CrMo(6)O(24)]·4H(2)O, the Anderson-type [H(6)CrMo(6)O(24)](3-) polyoxoanion is centrosymmetric, with the Cr(III) ion lying on an inversion center. One of the two crystallographiclly independent morpholinium cations is half-occupied. Inter-molecular N-H?O and O-H?O hydrogen bonds link the cations, polyoxoanions and uncoordinated water mol-ecules.

| S-EPMC3120305 | biostudies-literature

(?-Oxalato-?O,O:O,O)bis-[bis-(2,2'-bipyridine-?N,N')cobalt(II)] ?(6)-oxido-dodeca-?(2)-oxido-hexa-oxido-hexa-tungstate(VI).

Project description:The asymmetric unit of the title compound, [Co(2)(C(2)O(4))(C(10)H(8)N(2))(4)][W(6)O(19)], consists of one half of the complex [Co(2)(C(2)O(4))(C(10)H(8)N(2))(4)](2+) cation and one half of the Lindqvist-type [W(6)O(19)](2-) isopolyanion. Both constituents are completed by crystallographic inversion symmetry. In the dimeric cation, the Co(II) atom is surrounded in a distorted octa-hedral coordination by four N atoms from two chelating 2,2'-bipyridine ligands and by two O atoms from the chelating oxalate anion. The Lindqvist-type anion exhibits the characteristic W-O bond-length distribution, with the shortest bonds being the W-O(terminal) bonds and the longest being those to the central O atom.

| S-EPMC3006761 | biostudies-literature

Tetra-imidazolium hexa-?(4)-oxido-dodeca-?(2)-oxido-dodeca-oxidohexa-arsenate(III)hexa-molybdenum(VI)cuprate(II).

Project description:The title compound, (C(3)H(5)N(2))(4)[As(6)CuMo(6)O(30)], is made up of a centrosymmetric anionic cluster and four imidazolium cations. In the cluster, the central Cu(II) atom is six-coordinated and lies on an inversion center. Adjacent clusters are linked via N-H?O hydrogen bonds between the imidazole cations and polyoxidoanions into a three-dimensional supra-molecular architecture.

| S-EPMC2983113 | biostudies-literature

Octa-kis(dimethyl sulfoxide-κO)cerium(III) μ(6)-oxido-dodeca-μ(2)-oxido-hexa-oxidohexa-molybdate(VI) dimethyl sulfoxide tetrasolvate.

Project description:The title complex, [Ce(C(2)H(6)OS)(8)](2)[Mo(6)O(19)](3)·4C(2)H(6)OS, was obtained as a byproduct of the reaction of [(C(4)H(9))(4)N](2)[Mo(6)O(19)] with Ce(NO(3))(3)·6H(2)O and phthalic acid in dimethyl-sulfoxide solution. The asymmetric unit consists of a complex [Ce(C(2)H(6)OS)(8)](3+) cation, one and a half of the Lindqvist-type [Mo(6)O(19)](2-) polyanions and two dimethyl-sulfoxide solvent mol-ecules; the half polyanion lies on an inversion center. The Ce(3+) ion is coordinated by eight dimethyl-sulfoxide ligands through the O atoms in the form of a distorted square antiprism. The Ce-O bond lengths range from 2.429 (6) to 2.550 (5) Å. The cohesion of the structure is ensured by S⋯O [3.115 (6), 3.242 (10) and 3.12 (3) Å], O⋯O [3.037 (10) Å] and C-H⋯O inter-actions between cations and anions. The S and C atoms of a dmso ligand are disordered over three sites in a 0.45:0.30:0.25 ratio. The dimethyl-sulfoxide solvent mol-ecules are highly disordered and could not be modelled successfully; their contribution was therefore removed from the refinement using the SQUEEZE routine in PLATON [Spek (2009 ▶). Acta Cryst. D65, 148-155]. Potential solvent-accessible voids of 500.0 Å(3) occur in the crystal structure.

| S-EPMC3393199 | biostudies-literature

Bis[bis-(1,10-phenanthroline-?N,N')copper(I)] ?(6)-oxido-dodeca-kis-?(2)-oxido-hexa-oxidohexa-tungsten(VI).

Project description:The title compound, [Cu(C(12)H(8)N(2))(2)](2)[W(6)O(19)], consists of two [Cu(phen)(2)](+) cations (phen = 1,10-phenanthroline) and one typical [W(6)O(19)](2-) isopolyanion. The Cu(I) atom is coordinated by four N atoms from two bidentate chelating phen ligands in a distorted tetra-hedral geometry. The hexa-tungstate anion, lying on an inversion center and possessing the well known Lindqvist structure, is formed by six edge-sharing WO(6) octa-hedra, thus exhibiting an approximate O(h) symmetry. Three kinds of O atoms exist in the hexa-tungstate, viz. terminal O(a), bridging O(b) and central O(c) atoms. Besides the electrostatic effects between the anions and cations, weak C-H?O hydrogen bonds exist between the phen ligands and O(a) or O(b) atoms. The mean inter-planar distances of 3.485?(1) and 3.344?(1)?Å indicate ?-? stacking inter-actions between neighboring phen ligands. These weak hydrogen bonds and ?-? stacking inter-actions lead to a two-dimensional network.

| S-EPMC2969434 | biostudies-literature

Tris(2,2'-bipyridine-?(2) N,N')cobalt(II) bis-(hexa-fluoridophosphate).

Project description:In the title compound, [Co(C10H8N2)3](PF6)2, the Co(II) atom is coordinated by the six N atoms of three 2,2'-bipyridyl ligands and adopts a highly distorted octa-hedral geometry. The crystal used was a merohedral twin, the refined ratio of twin components being 0.820?(1):0.180?(1). The crystal structure features weak C-H?F inter-actions, forming a three-dimensional network.

| S-EPMC3588389 | biostudies-literature

Hexa-kis-(dimethyl sulfoxide-?O)calcium ?(6)-oxido-dodeca-kis-?(2)-oxido-hexa-oxido-hexa-tungstate(VI).

Project description:In the title compound, [Ca(C(2)H(6)OS)(6)][W(6)O(19)], the cation and anion both have a crystallographically imposed centre of symmetry. The Ca(II) atom in the cation is coordinated by six O atoms from six dimethyl sulfoxide ligands in a distorted octa-hedral geometry. The [W(6)O(19)](2-) isopolyanion possesses the well-known Lindqvist structure in which each W(VI) atom is coordinated by four ?(2)-O, one terminal O and one ?(6)-O atom.

| S-EPMC3344417 | biostudies-other

A new mono-functionalized organoimido hexa-molybdate derivative: bis-(tetra-n-butyl-ammonium) (5-chloro-2-methyl-phenyl-imido)-?(6)-oxido-dodeca-?(2)-oxido-penta-oxidohexa-molybdate(VI).

Project description:The title complex, [(C(4)H(9))(4)N](2)[Mo(6)(C(7)H(6)ClN)O(18)], was prepared by the reaction of (Bu(4)N)(4)[?-Mo(8)O(26)] and 2-methyl-5-chloro-aniline hydro-chloride with N,N'-dicyclo-hexyl-carbodiimide as dehydrating agent in dry acetonitrile solution. The aryl-imido ligand is linked to an Mo atom of the Lindqvist-type hexamolybdate anion by an Mo N triple bond, with a bond length of 1.732?(4)?Å and an Mo N-C bond angle of 169.1?(4)°, typical for monodentate imido groups in such hybrid complexes. Due to the inter-action between one H atom in the aryl group and an O atom of a symmetry-related hexa-molybdate cluster, the anions form centrosymmetric dimers in the crystal structure. Weak C-H?O contacts are observed between the cations and anions. Unresolved disorder in some of the butyl chains of the ammonium cation is noted.

| S-EPMC3201350 | biostudies-literature

Bis(tetra-butyl-ammonium) [2-(eth-oxy-carbony)phenyl-imido]-μ(6)-oxido-dodeca-μ(2)-oxido-penta-oxidohexa-molybdenum diethyl ether hemisolvate.

Project description:In the title complex, [(C(4)H(9))(4)N](2)[Mo(6)O(18)(C(9)H(9)NO(2))]·0.5C(4)H(10)O, the aryl-imido ligand is linked to an Mo atom of the Lindqvist-type polyoxidometalate anion by an Mo N bond of 1.726 (4) Å. The Mo N-C angles are 160.7 (5) and 167.6(5)° because of disorder affecting the aryl group, and is typical for the imido monodentate behaviour described in analogous hybrids. Light components of the structure are extensively disordered. The aryl ester group is disordered over two positions with occupancies refined to 0.559 (3) and 0.441 (3). Both independent tetra-butyl-ammonium cations have butyl chains partially split over two sites, with occupancies as in the aryl group of the anion. Finally, the ether solvent mol-ecule is disordered around an inversion centre. In the crystal, cations and anions inter-act via C-H⋯O contacts, involving O atoms of the polyoxidometalate anion and the ester group of the aryl-imido ligand as acceptor groups.

| S-EPMC3393191 | biostudies-literature

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