Acta Cryst. (2007). E63, m1-m3  [ doi:10.1107/S1600536806048665 ]

catena-Poly[[[diaqua(6-carboxypyridine-2-carboxylato-³O,N,O')erbium(III)]--pyridine-2,6-dicarboxylato-⁴O,N,O':O] tetrahydrate]

C.-X. Cheng, H.-W. Liu, Z.-Q. Hu, F.-H. Luo and M.-N. Cao

Abstract: In the title structure, {[Er(C₇H₃NO₄)(C₇H₄NO₄)(H₂O)₂]·4H₂O}_n, the Er^III atom is nine-coordinated by a tridendate pyridine-2,6-dicarboxylate (pdc) ligand, a tridentate 6-carboxypyridine-2-carboxylate ligand (Hpdc), two water molecules and a bridging carboxylate O atom from a symmetry-related ligand, forming a one-dimensional chain structure propagating along the c axis. In the crystal structure, intermolecular O-HO hydrogen bonds link these chains into a three-dimensional network.

Online 6 December 2006

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