Received 28 September 2012
aDepartment of Chemistry, Faculty of Science, Ubon Ratchathani Ratjabhat University, Muang, Ubon Ratchathani 34000, Thailand,bDepartment of Chemistry, Faculty of Science, Naresuan University, Muang, Phitsanulok 65000, Thailand, and cMolecular Technology Research Unit, Department of Chemistry, Walailak University, Nakhon Si Thammarat 80161, Thailand
Correspondence e-mail: firstname.lastname@example.org
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-HO hydrogen bonds involving the nitrate anions and coordinating water molecules. Intramolecular O-HO 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).
For the synthesis, structures and properties of related cadmium coordination polymers with the pyrimidine dicarboxylate ligand, see: Sava et al. (2008); Zhang et al. (2008); Rodríguez-Diéguez et al. (2007). For - interactions, see: Janiak (2000).
Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: TK5156 ).
The authors thank Professor Ian D. Williams and Dr Herman H.-Y. Sung of the Department of Chemistry, The Hong Kong University of Science and Technology, for their kind help during the X-ray study and for valuable discussions. KC thanks the Thailand Research Funds (project approval No. MRG5480189) for financial support.
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