(IUCr) Crystallography Journals Online

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Acta Cryst. (2009). E65, m76 [ doi:10.1107/S1600536808041664 ]

Poly[diaqua--oxalato--pyrazine-2-carboxylato-lanthanum(III)]

L. Han, Q.-H. Meng, J.-D. Hao, Y.-F. Luo and R.-H. Zeng

Abstract: In the title complex, [La(C₅H₃N₂O₂)(C₂O₄)(H₂O)₂]_n, the La^III ion is coordinated by one N and three O atoms from two pyrazine-2-carboxylate ligands, by four O atoms from two oxalate ligands and by two O atoms of two water molecules, displaying a distorted bicapped square-antiprismatic geometry. The carboxylate groups of pyrazine-2-carboxylate and oxalate ligands link the lanthanum metal centres, forming layers parallel to (10 $\\overline{1}$ ). The layers are further connected by intermolecular O-HO and N-HO hydrogen-bonding interactions, forming a three-dimensional supramolecular network.

Online 17 December 2008