Tetra­aqua­bis­1-(3-carb­oxy­phen­yl)-44′-bipyridin-1-ium-κN 1′zinc bis­(45-carb­oxy­benzene-12-dicarboxyl­ate) 2.5-hydrate

摘要

In the complex cation of the title compound, [Zn(C17H13N2O2)2(H2O)4](C10H4O8)2·2.5H2O, the Zn^II 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.