Received 31 October 2008
In the title coordination polymer, [Cu(C9H8NO4)2]n, the Cu atom, located on a twofold rotation axis, is four coordinate in a distorted square-planar environment. Each 2,6-dimethylpyridinium-3,5-dicarboxylate anion bridges two Cu atoms, forming a two-dimensional coordination polymer. A three-dimensional supramolecular network is built from N-HO hydrogen bonds involving the pyridinium NH and the carboxyl COO groups.
For the synthesis of 2,6-dimethylpyridine-3,5-dicarboxylic acid, see: Checchi et al. (1959). For the crystal structures of some of its metal complexes, see: Gao et al. (2007); Shi et al. (2007); Zeng et al. (2000, 2002).
Data collection: RAPID-AUTO (Rigaku, 1998); cell refinement: RAPID-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: NG2511 ).
The authors thank the Project of the Science and Technology Foundation of Heilongjiang Provincial Education Department (grant No. 11523041) and Heilongjiang East College for supporting this study.
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