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Acta Cryst. (2013). E69, m663
[ doi:10.1107/S1600536813030675 ]

Bis(5-hy­droxy­isophthalato-[kappa]O1)bis­[4-(pyridine-3-carboxamido-[kappa]N3)pyridinium]copper(II) tetra­hydrate

M. E. O'Donovan and R. L. LaDuca

Abstract: In the title compound, [Cu(C11H10N3O)2(C8H4O5)2]·4H2O, the CuII ion, located on a crystallographic inversion center, is coordinated in a square-planar environment by two trans-O atoms belonging to two monodentate 5-hy­droxy­isophthalate (hip) dianions and two trans nicotinamide pyridyl N-donor atoms from monodentate protonated pendant N-(pyridin-4-yl)nicotinamide (4-pnaH) ligands. The protonated 4-pyridyl­amine groups engage in N-H+...O- hydrogen-bond donation to unligated hip O atoms to construct supra­molecular chain motifs parallel to [100]. Water mol­ecules of crystallization, situated between the chains, engage in O-H...O hydrogen bonding to form supra­molecular layers and the overall three-dimensional network structure.

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