Acta Cryst. (2005). E61, m2329-m2331  [ doi:10.1107/S1600536805032824 ]

Poly[hexaaquatris(₃-3-carboxypyrazole-5-carboxylato)(3-carboxypyrazole-5-carboxylato-O)(₂-pyrazole-3,5-dicarboxylato)dicerium(III)]

X.-H. Li

Abstract: In the title compound, [Ce₂(C₅H₂N₂O₄)(C₅H₃N₂O₄)₄(H₂O)₆]_n, each Ce atom is nine-coordinated by three water molecules, four 3-carboxypyrazole-5-carboxylate monoanions (two pairs of symmetry-related anions), and a pyrazole-3,5-dicarboxylate dianion. Two symmetry-related Ce atoms are bridged by a pyrazole-3,5-dicarboxylate dianion, which lies across a twofold rotation axis. There are two independent 3-carboxypyrazole-5-carboxylate monoanions which differ in their coordination modes; one is monodentate and the other is tetradentate. The Ce atoms are bridged by both pyrazole-3,5-dicarboxylate dianions and 3-carboxypyrazole-5-carboxylate monoanions, generating a three-dimensional network structure.

Online 19 October 2005

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