Received 20 August 2008
aResearch Institute of Applied Chemistry, Central South University of Forestry and Technology, 412006 Zhuzhou, Hunan, People's Republic of China, and bSchool of Environmental and Energy Engineering, Beijing University of Civil Engineering and Architecture, 100044 Beijing, People's Republic of China
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In the hydrothermally synthesized title compound, [Ce(C5H3N2O2)(C2O4)(H2O)2]n, the CeIII ion is coordinated by four O atoms from two different oxalate ligands, three O atoms from two symmetry-related pyrazine-2-carboxylate ligands, two O atoms from two water melecules and one N atom from a pyrazine-2-carboxylate ligand in a distorted bicapped square-antiprismatic coordination geometry. The oxalate and pyrazine-2-carboxylate ligands bridge the CeIII ions, forming a two-dimensional structure. In addition, intermolecular O-HO and O-HN hydrogen bonds connect the two-dimensional structure into a three-dimensional network.
Data collection: SMART (Bruker, 1996); cell refinement: SAINT (Bruker, 1996); data reduction: SAINT; 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: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: LH2687 ).
The authors gratefully acknowledge the financial support of the Research Fund of Beijing University of Civil Engineering and Architecture (grant No. 100700502) and the Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality (grant No. BJE10016200611).
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