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

DOI: 10.1107/s1600536811053566

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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 InIII 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—H...O hydrogen-bonding network, involving the coordinated and lattice water molecules and the carboxyl groups of the ligands, together with C—H...O and π–π interactions [centroid–centroid distance = 3.793 (1) ], leads to the formation of a three-dimensional structure.


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