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Aqua-tricarbon-yl(4-carboxy-pyridine-2-carboxyl-ato-?N,O)rhenium(I).

ABSTRACT: There are two mol-ecules with similar bond dimensions in the asymmetric unit of the title complex, [Re(C(7)H(4)NO(4))(CO)(3)(H(2)O)]. The metal centre is coordinated facially by three carbonyl groups, is chelated by a 4-carboxy-pyridine-2-carboxyl-ate ligand and is also coordinated by a water mol-ecule. O-H?O hydrogen bonds give rise to a three-dimensional network.

SUBMITTER: Schutte M

PROVIDER: S-EPMC2959348 | biostudies-literature | 2008 Sep

REPOSITORIES: biostudies-literature

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Aqua-tricarbon-yl(4-carboxy-pyridine-2-carboxyl-ato-κN,O)rhenium(I).

Schutte Marietjie M Visser Hendrik G HG

Acta crystallographica. Section E, Structure reports online 20080906 Pt 10

There are two mol-ecules with similar bond dimensions in the asymmetric unit of the title complex, [Re(C(7)H(4)NO(4))(CO)(3)(H(2)O)]. The metal centre is coordinated facially by three carbonyl groups, is chelated by a 4-carboxy-pyridine-2-carboxyl-ate ligand and is also coordinated by a water mol-ecule. O-H⋯O hydrogen bonds give rise to a three-dimensional network. ...[more]

PMID: 21200987

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Aqua-tricarbon-yl(3,5,7-tribromo-tropolonato)rhenium(I) methanol solvate.

Project description:The title complex, [Re(C(7)H(2)Br(3)O(2))(CO)(3)(H(2)O)]·CH(3)OH, crystallized as a neutral Re(I) compound and one methanol solvent mol-ecule in the asymmetric unit. The metal centre is coordinated facially by three carbonyl groups. The bidentate tribromo-tropolanate ligand and a water mol-ecule complete the distorted octahedral coordination around the central metal. Inter-molecular Br?O [3.226?(5)?Å] and Br?Br [3.590?(2)?Å] contacts are observed between adjacent mol-ecules. These contacts, together with an array of O-H?O, O-H?Br and C-H?O hydrogen bonds, complete a three-dimensional polymeric network formed between the methanol solvent and the complex.

| S-EPMC2960052 | biostudies-literature

Acridinium (6-carboxy-pyridine-2-carboxyl-ato)(pyridine-2,6-dicarboxyl-ato)zincate(II) penta-hydrate.

Project description:The reaction of Zn(NO(3))(2) with pyridine-2,6-dicarboxylic acid (pydcH(2)) and acridine (acr) in aqueous solution leads to the formation of the title compound, (C(13)H(10)N)[Zn(C(7)H(3)NO(4))(C(7)H(4)NO(4))]·5H(2)O or (acrH)[Zn(pydcH)(pydc)]·5H(2)O. In the title compound, the Zn(II) atom is coordinated by four O atoms and two N atoms from the tridentate chelating rings of (pydc)(2-) and (pydcH)(-) anions. The geometry of the resulting ZnN(2)O(4) coordination can be described as distorted octa-hedral. To balance the charges, one protonated acridine (acrH)(+) cation is present. In the crystal structure, extensive O-H?O and N-H?O hydrogen bonds involving acrH(+), the complex anion and uncoordinated water mol-ecules form a three-dimensional network.

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Crystal structure of fac-tricarbon-yl(quinoline-2-carboxyl-ato-κ(2) N,O)(tri-phenyl-arsane-κAs)rhenium(I).

Project description:In the title compound, [Re(C10H6NO2)(CO)3{As(C6H5)3}], the coordination environment of Re(I) is that of a distorted octa-hedron. Three coordination sites are occupied by three carbonyl groups in a facial arrangement and the remaining three sites by tri-phenyl-arsane and deprotonated quinaldic acid in As-mono- and N,O-bidentate fashions, respectively. In the crystal, the complexes are linked through weak C-H⋯O hydrogen bonds, forming a three-dimensional network. It worth noting that, as far as we know, this complex is the first Re(I) tri-phenyl-arsane tricarbonyl compound to be reported.

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Poly[[penta-aqua-(?(4)-pyridine-2,4,6-tri-carboxyl-ato)(?(3)-pyridine-2,4,6-tri-carboxyl-ato)diterbium(III)] mono-hydrate].

Project description:The three-dimensional title coordination polymer, {[Tb(2)(C(8)H(2)NO(6))(2)(H(2)O)(5)]·H(2)O}(n), was hydro-thermally synthesized by reacting the corresponding rare-earth salt with pyridine-2,4,6-tricarb-oxy-lic acid (H(3)ptc). There are two independent Tb(III) atoms in the structure, one of which is nine-coordinated, forming a monocapped NO(8) square-anti-prism and the other is eight-coordinated exhibiting a 4,4-bicapped NO(7) trigonal-prismatic environment. The complex units are inter-connected through the ptc(3-) anions acting in different coordination modes, resulting in a three-dimensional coordin-ation polymer. The crystal structure features extensive O-H?O hydrogen bonds.

| S-EPMC3414173 | biostudies-literature

Poly[[penta-aqua-(?(4)-pyridine-2,4,6-tri-carboxyl-ato)(?(3)-pyridine-2,4,6-tri-carboxyl-ato)disamarium(III)] mono-hydrate].

Project description:The asymmetric unit of the title compound, {[Sm(2)(C(8)H(2)NO(6))(2)(H(2)O)(5)]·H(2)O}(n), contains two independent Sm(III) ions, two pyridine-2,4,6-tricarboxyl-ate (ptc) ligands, five aqua ligands and one lattice water mol-ecule. One Sm(III) ion is nine-coordinated by one N and five O atoms from the three ptc ligands and three aqua ligands in a distorted monocapped square antiprismatic geometry, and the other is eight-coordinated by one N and five O atoms from three ptc ligands and two aqua ligands in a 4,4'-bicapped trigonal anti-prismatic geometry. The ptc ligands brigde the Sm(III) ions into a three-dimensional polymeric framework. Extensive O-H?O hydrogen bonding is observed in the crystal structure.

| S-EPMC3297243 | biostudies-literature

fac-Tricarbon-yl(pyridine-?N)(1,1,1-trifluoro-acetyl-acetonato-?O,O')rhenium(I).

Project description:In the title compound, [Re(C(5)H(4)F(3)O(2))(C(5)H(5)N)(CO)(3)], the Re(I) atom is six-coordinated owing to bonding by three carbonyl ligands arranged in a fac configuration, two O atoms from the bidentate 1,1,1-trifluoro-acetyl-acetonate ligand and an N atom from a pyridine ligand. In the crystal, the mol-ecules pack in layers, diagonally, in a head-to-tail fashion across the ab plane. These layers are stabilsed by inter-molecular C-H?O and C-H?F hydrogen bonds.

| S-EPMC3247548 | biostudies-literature

Aqua-bis-(5-butyl-pyridine-2-carboxyl-ato)zinc monohydrate.

Project description:In the title complex, [Zn(C(10)H(12)NO(2))(2)(H(2)O)]·H(2)O, the Zn(II) ion is coordinated by two N and two O atoms from two 5-n-butyl-pyridine-2-carboxyl-ato ligands and one O atom from a water mol-ecule in a distorted square-pyramidal geometry. In the crystal, inter-molecular O-H?O hydrogen bonds link mol-ecules into a two-dimensional supramolecular structure parallel to (001).

| S-EPMC3151896 | biostudies-literature

Aqua-[6-carboxyl-ato-N'-(pyridin-2-yl-methyl-idene)pyridine-2-carbohydrazidato]copper(II) trihydrate.

Project description:In the title compound, [Cu(C(13)H(8)N(4)O(3))(H(2)O)]·3H(2)O, the complex molecule, except for the aqua ligand, is essentially planar [r.m.s. deviation = 0.034?(2)?Å]. The coordination polyhedron of the Cu(2+) cation is a square-pyramid, with the aqua ligand at the apex. The compound exhibits a three-dimensional structure, which is is stabilized by O-H?O and O--H?N hydrogen bonds and ?-? inter-actions [centroid-centroid distance = 2.987?(3)?Å].

| S-EPMC3379113 | biostudies-literature

Bis-(?-pyridine-2,3-dicarboxyl-ato)bis-[aqua-(3-carb-oxy-pyridine-2-carboxyl-ato)indium(III)] tetra-hydrate.

Project description:In the binuclear centrosymmetric title compound, [In(2)(C(7)H(3)NO(4))(2)(C(7)H(4)NO(4))(2)(H(2)O)(2)]·4H(2)O, which contains both pyridine-2,3-dicarboxyl-ate and 3-carb-oxy-pyridine-2-carboxyl-ate ligands, the In(III) atom is six-coordinated in a distorted octa-hedral geometry. One pyridine ligand is N,O-chelated while the other is N,O-chelated and at the same time bridging to the other via the second carboxyl group. In the crystal, an extensive O-H?O hydrogen-bonding network, involving the coordinated and lattice water mol-ecules and the carboxyl groups of the ligands, together with C-H?O and ?-? inter-actions [centroid-centroid distance = 3.793?(1)?Å], leads to the formation of a three-dimensional structure.

| S-EPMC3254334 | biostudies-literature

Poly[(?6-4-amino-3,5,6-trichloro-pyridine-2-carboxyl-ato)aqua-caesium].

Project description:In the structure of the title complex, [Cs(C6H2Cl3N2O2)(H2O)] n , the caesium salt of the commercial herbicide picloram, the Cs(+) cation lies on a crystallographic mirror plane, which also contains the coordinating water mol-ecule and all non-H atoms of the 4-amino-3,5,6-trichloro-picolinate anion except the carboxyl-ate O-atom donors. The irregular CsCl4O5 coordination polyhedron comprises chlorine donors from the ortho-related ring substituents of the picloramate ligand in a bidentate chelate mode, with a third chlorine bridging [Cs-Cl range 3.6052?(11)-3.7151?(11)?Å] as well as a bidentate chelate carboxyl-ate group giving sheets extending parallel to (010). A three-dimensional coordination polymer structure is generated through the carboxyl-ate group, which also bridges the sheets down [010]. Within the structure, there are intra-unit water O-H?Ocarboxyl-ate and amine N-H?Npyridine hydrogen-bonding inter-actions.

| S-EPMC3588279 | biostudies-literature

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