Bis(-pyridine-2,3-dicarboxylato)bis[aqua(3-carboxypyridine-2-carboxylato)indium(III)] tetrahydrate

Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 1 (January 2012)

metal-organic compounds

su2349 scheme

Acta Cryst. (2012). E68, m71-m72 [ doi:10.1107/S1600536811053566 ]

Bis(-pyridine-2,3-dicarboxylato)bis[aqua(3-carboxypyridine-2-carboxylato)indium(III)] tetrahydrate

H. Eshtiagh-Hosseini, M. Mirzaei, A. Mousavinezhad, M. Necas and J. T. Mague

Abstract: In the binuclear centrosymmetric title compound, [In₂(C₇H₃NO₄)₂(C₇H₄NO₄)₂(H₂O)₂]·4H₂O, which contains both pyridine-2,3-dicarboxylate and 3-carboxypyridine-2-carboxylate ligands, the In^III atom is six-coordinated in a distorted octahedral geometry. One pyridine ligand is N,O-chelated while the other is N,O-chelated and at the same time bridging to the other via the second carboxyl group. In the crystal, an extensive O-HO hydrogen-bonding network, involving the coordinated and lattice water molecules and the carboxyl groups of the ligands, together with C-HO and [pi] - [pi] interactions [centroid-centroid distance = 3.793 (1) Å], leads to the formation of a three-dimensional structure.