Received 29 July 2009
aSchool of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China, and bKey Laboratory of the Technology of Electrochemical Energy Storage and Power Generation in Guangdong Universities, South China Normal University, Guangzhou 510006, People's Republic of China
Correspondence e-mail: firstname.lastname@example.org
In the title complex, [Nd(C5H3N2O2)(C2O4)(H2O)2]n, the NdIII atom is ten-coordinated by one N atom and three O atoms from two pyrazine-2-carboxylate ligands, four O atoms from two oxalate ligands and two water molecules in a distorted bicapped square-antiprismatic geometry. The two crystallographically independent oxalate ligands, each lying on an inversion center, act as bridging ligands, linking Nd atoms into an extended zigzag chain. Neighboring chains are linked by the pyrazine-2-carboxylate ligands into a two-dimensional layerlike network in the (10) plane. The layers are further connected by O-HO and O-HN hydrogen bonds, forming a three-dimensional supramolecular network.
Data collection: APEX2 (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HY2217 ).
The authors acknowledge the Chan Xue Yan Cooperative Special Project of Guangdong Province and the Ministry of Science and Technology of PRC (project No. 2007A090302046) and the Project of Science and Technology of Guangdong Province (project No. 2007A020200002-4) for supporting this work.
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