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Poly[aqua-(?(2)-pyrimidine-2-carboxyl-ato-?(4)O,N:O',N')(nitrato-?O)cadmium].

ABSTRACT: In the title polymer, [Cd(C(5)H(3)N(2)O(2))(NO(3))(H(2)O)](n), the Cd(II) atom is seven-coordinate in a distorted capped octa-hedral geometry by two N atoms of two different pyrimidine dicarboxyl-ate (pmc) ligands, three O atoms from three separate pmc ligands, and two O atoms of disordered nitrate anions or water mol-ecules. The Cd(II) atoms are bridged by the pmc ligands in a chelating/bridging bis-bidentate and chelating bidentate mode, forming sheets parallel to (20-1). The sheets are further linked into a three-dimensional supra-molecular network via classical O-H?O hydrogen bonds involving the nitrate anions and coordinating water mol-ecules. Intra-molecular O-H?O hydrogen bonding is also observed. The non-coordinating nitrate O atoms are disordered over two sets of sites with occupancies of 0.57?(7) and 0.43?(7).

SUBMITTER: In-Noi O

PROVIDER: S-EPMC3515109 | biostudies-literature | 2012 Nov

REPOSITORIES: biostudies-literature

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Poly[aqua-(μ(2)-pyrimidine-2-carboxyl-ato-κ(4)O,N:O',N')(nitrato-κO)cadmium].

In-Noi Orrasa O Chainok Kittipnog K Harding David J DJ

Acta crystallographica. Section E, Structure reports online 20121013 Pt 11

In the title polymer, [Cd(C(5)H(3)N(2)O(2))(NO(3))(H(2)O)](n), the Cd(II) atom is seven-coordinate in a distorted capped octa-hedral geometry by two N atoms of two different pyrimidine dicarboxyl-ate (pmc) ligands, three O atoms from three separate pmc ligands, and two O atoms of disordered nitrate anions or water mol-ecules. The Cd(II) atoms are bridged by the pmc ligands in a chelating/bridging bis-bidentate and chelating bidentate mode, forming sheets parallel to (20-1). The sheets are furthe ...[more]

PMID: 23284336

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catena-Poly[[tetra-aqua-μ-aqua-bis-(μ(4)-pyrimidine-2-carboxyl-ato)tetra-lithium] dichloride].

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| S-EPMC3515122 | biostudies-literature

Poly[aqua-(μ(3)-pyridazine-4-carboxyl-ato-κO:O:O')lithium].

Project description:The structure of the title compound, [Li(C(5)H(3)N(2)O(2))(H(2)O)](n), is composed of centrosymmetric dimers in which two Li(I) ions are bridged by a carboxyl-ate O atom, each donated by a ligand, acting in a bidentate mode. The second carboxyl-ato O atoms bridge the dimers to Li(I) ions in adjacent dimers, forming mol-ecular layers parallel to (001). Each Li(I) ion is coordinated by two bridging carboxyl-ate O atoms, a bridging carboxyl-ate O atom donated by the adjacent dimer and an aqua O atom, resulting in a distorted tetra-hedral coordination geometry. The layers are held together by O-H⋯N hydrogen bonds in which coordinated water O atoms act as donors and ligand hetero-ring N atoms as acceptors.

| S-EPMC3099971 | biostudies-literature

catena-Poly[[aqua-(1,10-phenanthroline)cadmium(II)]-μ-benzene-1,4-di-carboxyl-ato].

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catena-Poly[[cobalt(II)-μ-aqua-μ-propano-ato-κO:O'-μ-propano-ato-κO:O] monohydrate].

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Poly[μ(2)-aqua-μ(2)-(pyrazine-2-carboxyl-ato)-lithium].

Project description:The structure of the title compound, [Li(C(5)H(3)N(2)O(2))(H(2)O)](n), contains an Li(I) ion with a distorted trigonal-bipyramidal coordination environment involving the N and O atoms of pyrazine-2-carboxyl-ate ligands with a bridging carboxyl-ate group, and two aqua O atoms also in a bridging mode. The symmetry-related Li(I) ions bridged by a carboxyl-ate O atom and a coordinating water O atom form an Li(2)O(2) unit with an Li⋯Li distance of 3.052 (4) Å, which generates mol-ecular ribbons propagating in the c-axis direction. The ribbons are held together by a network of O-H⋯O hydrogen bonds in which the coordinating water mol-ecules act as donors and the carboxyl-ate O atoms as acceptors.

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Poly[(aqua-calcium)-μ(4)-pyrazine-2,3-di-carboxyl-ato].

Project description:The polymeric title compound, [Ca(C(6)H(2)N(2)O(4))(H(2)O)](n), was synthesized from pyrazine-2,3-dicarb-oxy-lic acid and calcium dichloride under hydro-thermal conditions. The Ca(2+) cation is seven-coordinated by five O atoms and one N atom of four pyrazine-2,3-dicarboxyl-ate anions, and one water mol-ecule. The complete deprotonated pyrazine-2,3-dicarboxyl-ate anion adopts a μ(4)-coordination mode, resulting in the formation of a three-dimensional structure.

| S-EPMC3238750 | biostudies-literature

Bis(2-amino-pyrimidine-κN)aqua-(nitrato-κO)(nitrato-κO,O')zinc(II).

Project description:The water-coordinated Zn atom in the title monoaqua zinc nitrate adduct of 2-amino-pyrimidine, [Zn(NO(3))(2)(C(4)H(5)N(3))(2)(H(2)O)], is bonded to a monodentate nitrate ion and is chelated by the other nitrate ion. The heterocyclic ligands coordinate through ring N-donor sites. The coordination geometry about the Zn(II) atom is a distorted octa-hedron. Intra-molecular N-H⋯O hydrogen bonds occur. In the crystal, adjacent adduct mol-ecules are linked by O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonds into a layer motif parallel to (001).

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Crystal structure of catena-poly[[[aqua-lithium(I)]-μ-pyrimidine-2-carboxyl-ato-κ(4) N (1),O (2):N (3),O (2')] hemihydrate].

Project description:The title compound, {[Li(C5H3N2O2)(H2O)]·0.5H2O} n , comprises four symmetry-independent Li(C5H3N2O2)(H2O) units which form mol-ecular ribbons running along the c-axis direction. Within each ribbon, the ligand mol-ecule, acting in a μ2-mode, bridges two adjacent Li(+) cations using both of its N,O-bonding sites. The coordination environment of each of the four Li(+) cations can be described alternatively as either slightly distorted trigonal-bipyramidal or slightly distorted square-pyramidal. The ribbons are inter-connected by a network of O-H⋯O hydrogen bonds.

| S-EPMC4331868 | biostudies-literature

Poly[di-μ(2)-azido-μ(3)-pyrazine-2-carboxyl-ato-cadmium(II)].

Project description:The title compound, [Cd(C(5)H(3)N(2)O(2))(N(3))](n), has been pre-pared by the reaction of pyrazine-2-carboxylic acid, cadmium(II) nitrate and sodium azide. In the structure, the Cd(II) atom is six-coordinated by two azide anions and three pyrazine-2-carboxyl-ate ligands. Each pyrazine-2-carboxyl-ate ligand bridges three Cd(II) atoms, whereas the azide ligand bridges two Cd(II) atoms, resulting in the formation of a two-dimensional metal-organic polymer developing parallel to the (100) plane.

| S-EPMC2977564 | biostudies-literature

catena-Poly[[(5-carb-oxy-2H-1,2,3-triazole-4-carboxyl-ato-κN,O)sodium]-di-μ-aqua-κO:O].

Project description:In the title coordination polymer, [Na(C(4)H(2)N(3)O(4))(H(2)O)(2)](n), the Na(I) atom is six-coordinated by one O atom and one N atom from a 2H-1,2,3-triazole-4-carb-oxy-5-carboxyl-ate ligand and four O atoms from four water mol-ecules, forming a distorted octa-hedal geometry. The Na(I) atoms are bridged by water mol-ecules into a chain structure along [100]. Inter-molecular N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds connect the chains. An intra-molecular O-H⋯O hydrogen bond between the carboxyl-ate groups is observed.

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