Received 7 November 2013
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 . Water molecules of crystallization, situated between the chains, engage in O-HO hydrogen bonding to form supramolecular layers and the overall three-dimensional network structure.
For the preparation of 4-pyridylnicotinamide, see: Gardner et al. (1954). For the preparation of other dicarboxylate coordination polymers containing 4-pyridylnicotinamide, see: Kumar (2009); Wilson et al. (2013)
Data collection: APEX2 (Bruker, 2006); cell refinement: SAINT (Bruker, 2012); data reduction: SAINT; program(s) used to solve structure: OLEX2 (Dolomanov et al., 2009); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: CrystalMaker (Palmer, 2007); software used to prepare material for publication: OLEX2.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HG5361 ).
We gratefully acknowledge Michigan State University for funding this work. We thank Dr A. Lifeson for helpful assistance.
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