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Tetraaquabis[1-(3-carboxyphenyl)-4,4′-bipyridin-1-ium-κN1′]zinc bis(4,5-carboxybenzene-1,2-dicarboxylate) 2.5-hydrate

DOI: 10.1107/s1600536811045156

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In the complex cation of the title compound, [Zn(C17H13N2O2)2(H2O)4](C10H4O8)2·2.5H2O, the ZnII atom, lying on an inversion center, is coordinated by two N atoms from two N-(3-carboxyphenyl)-4,4′-bipyridin-1-ium ligands and four water molecules in a distorted octahedral geometry. The pyromellitate anion is double deprotonated. O—H...O and C—H...O hydrogen bonds connect the cations, anions and uncoordinated water molecules into a three-dimensional supramolecular network. One of the two lattice water molecules shows an occupancy of 0.25. An intramolecular O—H...O hydrogen bond is present in the anion.


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