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Acta Cryst. (2012). E68, m1349-m1350
[ doi:10.1107/S1600536812041645 ]


O. In-noi, K. Chainok and D. J. Harding

Abstract: In the title polymer, [Cd(C5H3N2O2)(NO3)(H2O)]n, the CdII atom is seven-coordinate in a distorted capped octahedral geometry by two N atoms of two different pyrimidine dicarboxylate (pmc) ligands, three O atoms from three separate pmc ligands, and two O atoms of disordered nitrate anions or water molecules. The CdII 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 supramolecular network via classical O-H...O hydrogen bonds involving the nitrate anions and coordinating water molecules. Intramolecular 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).

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