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Poly[[diaqua-(ethanol)bis-(?(3)-pyridine-2,3-dicarboxyl-ato)dimanganese(II)] monohydrate].

ABSTRACT: The title compound, {[Mn(2)(C(7)H(3)NO(4))(2)(C(2)H(5)OH)(H(2)O)(2)]·H(2)O}(n), is a three-dimensional polymer. There are two symmetry-independent Mn(II) centres with different coordination environments: one Mn(II) atom is coordinated by four O atoms from four ligands and two N atoms from two ligands, the other Mn(II) atom is coordinated by three O atoms from two ligands, two water O atoms and the O atom of an ethanol mol-ecule. The crystal structure is stabilized by O-H?O hydrogen bonds.

SUBMITTER: Zhao YQ

PROVIDER: S-EPMC2970155 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature

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Poly[[diaqua-(ethanol)bis-(μ(3)-pyridine-2,3-dicarboxyl-ato)dimanganese(II)] monohydrate].

Zhao Yan-Qing YQ

Acta crystallographica. Section E, Structure reports online 20090819 Pt 9

The title compound, {[Mn(2)(C(7)H(3)NO(4))(2)(C(2)H(5)OH)(H(2)O)(2)]·H(2)O}(n), is a three-dimensional polymer. There are two symmetry-independent Mn(II) centres with different coordination environments: one Mn(II) atom is coordinated by four O atoms from four ligands and two N atoms from two ligands, the other Mn(II) atom is coordinated by three O atoms from two ligands, two water O atoms and the O atom of an ethanol mol-ecule. The crystal structure is stabilized by O-H⋯O hydrogen bonds. ...[more]

PMID: 21577443

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Project description:The title polymeric compound {(C(3)H(12)N(2))[Cu(C(7)H(3)NO(4))(2)]·3H(2)O}(n) or {(pnH(2))[Cu(py-2,3-dc)(2)]·3H(2)O}(n) (pn is propane-1,3-diamine and py-2,3-dcH(2) is pyridine-2,3-dicarboxylic acid), was synthesized by reaction of copper(II) chloride dihydrate with a proton-transfer compound, propane-1,3-diammonium pyridine-2,3-dicarboxyl-ate or (pnH(2))(py-2,3-dc), in aqueous solution. The anion is a six-coordinate complex (site symmetry ), with a distorted octa-hedral geometry around Cu(II), consisting of two bidentate pyridine-2,3-dicarboxyl-ate groups and two O atoms of bridging ligands from (py-2,3-dc)(2-) fragments, which are located in trans positions. The (pnH(2))(2+) cation is disordered over two sites by the center of inversion. Inter-molecular hydrogen bonds, π-π [centroid-centroid distances of 3.539 (3) Å] and C-O⋯π stacking inter-actions [O⋯Cg = 3.240 (5) Å; Cg is the center of the pyridine ring], connect the various components into a supra-molecular structure.

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Poly[(μ(4)-pyridine-2,3-dicarboxyl-ato)lead(II)].

Project description:In the title coordination polymer, [Pb(C(7)H(3)NO(4))](n), the Pb(II) ion is eight-coordinated in a distorted square-anti-prismatic geometry formed by one pyridine N atom and seven carboxyl-ate O atoms from four pyridine-2,3-dicarboxyl-ate (pda) anions. In the pda anion, the dihedral angles between the pyridine ring and carboxyl-ate groups are 19.5 (6) and 73.3 (6)°. The carboxyl-ate groups of the pda anions bridge the Pb ions, forming a two-dimensional coordination polymer parallel to (100). Weak inter-molecular C-H⋯O hydrogen boning is present in the crystal structure.

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Poly[[diaqua-μ(4)-pyrazine-2,3-dicarboxyl-ato-κN,O:O:O,O:O-strontium(II)] monohydrate].

Project description:In the title compound, {[Sr(C(6)H(2)N(2)O(4))(H(2)O)(2)]·H(2)O}(n), the Sr(II) ions are bridged by the pyrazine-2,3-dicarboxyl-ate ligands with the formation of two-dimensional polymeric layers parallel to the ac plane. Each Sr(II) ion is eight-coordinated by one N and five O atoms from the four ligands and two water mol-ecules. The coordination polyhedron is derived from a penta-gonal bipyramid with an O atom at the apex on one side of the equatorial plane and two O atoms sharing the apical site on the other side. The coordinated and uncoordinated water mol-ecules are involved in O-H⋯O and O-H⋯N hydrogen bonds, which consolidate the crystal structure.

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