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Benzene-1,3-diammonium bis-(pyridine-2,6-dicarboxyl-ato-?O,N,O)cobaltate(II) penta-hydrate.

ABSTRACT: In the title compound, (C(6)H(10)N(2))[Co(C(7)H(3)NO(4))(2)]·5H(2)O, the Co(II) ion is six-coordinated in an N(2)O(4) environment by two pyridine-2,6-dicarboxyl-ate (pydc) ligands, having a distorted octa-hedral geometry. The crystal packing is stabilized by inter-molecular N-H?O, O-H?O and weak C-H?O hydrogen bonds. There are also ?-? inter-actions between the pyridine rings of the pydc ligands and between the pydc ligands and the benzene-1,3-diammonium cations, with centroid-centroid distances of 3.4575?(15) and 3.7521?(15)?Å.

SUBMITTER: Pasdar H

PROVIDER: S-EPMC3099797 | biostudies-other | 2011 Apr

REPOSITORIES: biostudies-other

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Benzene-1,3-diammonium bis-(pyridine-2,6-dicarboxyl-ato-κO,N,O)cobaltate(II) penta-hydrate.

Pasdar Hoda H Sadat Kashani Saghi S Ghiasi Reza R Aghabozorg Hossein H Notash Behrouz B

Acta crystallographica. Section E, Structure reports online 20110331 Pt 4

In the title compound, (C(6)H(10)N(2))[Co(C(7)H(3)NO(4))(2)]·5H(2)O, the Co(II) ion is six-coordinated in an N(2)O(4) environment by two pyridine-2,6-dicarboxyl-ate (pydc) ligands, having a distorted octa-hedral geometry. The crystal packing is stabilized by inter-molecular N-H⋯O, O-H⋯O and weak C-H⋯O hydrogen bonds. There are also π-π inter-actions between the pyridine rings of the pydc ligands and between the pydc ligands and the benzene-1,3-diammonium cations, with centroid-centroid distances ...[more]

PMID: 21754013

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Creatininium bis-(pyridine-2,6-dicarboxyl-ato)chromate(III) pyridine-2,6-dicarboxylic acid hexa-hydrate.

Project description:The title compound, (C(4)H(8)N(3)O)[Cr(C(7)H(3)NO(4))(2)]·C(7)H(5)NO(4)·6H(2)O, was obtained by the reaction of Cr(NO(3))(3)·9H(2)O with pyridine-2,6-dicarboxylic acid (pydcH(2)) and creatinine (creat) in aqueous solution (molar ratio 1:2:2). The cation is a protonated creatinine (creatH(+)) while the anion is a bis-pydc(2-) Cr(III) complex. The Cr(III) is coordinated by four oxygen and two nitro-gen atoms of two (pydc)(2-) groups and has a disorted octa-hedral coordination environment. The structure also contains a neutral mol-ecule of pydcH(2) that is hydrogen bonded to the creatH(+) and six mol-ecules of water. Extensive inter-molecular inter-actions, including seventeen classical hydrogen bonds, two weak C-H?O bonds, and C-O?? stacking inter-actions, with O?centroid distances of 3.211?(13) and 3.300?(12)?Å, connect the various components in the crystal structure.

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