catena-Poly[[di­aqua­bis­(1,3-di­hydro-3-oxo­isobenzo­furan-1-acetato)­copper(II)]-μ-N,N′-(ethane-1,2-di­yl)dinicotinamide]

The title compound, {[Cu(C(10)H(7)O(4))(2)(C(14)H(14)N(4)O(2))(H(2)O)(2)]( n ), contains octa­hed­rally coordinated Cu(II) ions ligated by two bis­(1,3-di­hydro-3-oxo-1-isobenzo­furan­acetate (dibf) ligands and two trans water mol­ecules, linked by N,N′-(ethane-1,2-di­yl)dinicotinamide (edn) ligands into mono-periodic coordination polymer chains. The dibf ligands exhibit a pseudo-mirror positional disorder over two positions in a 89.2 (3)/10.8 (3) ratio; the central amide groups of the edn ligands are disordered pseudo-rotationally in the same ratio. These mono-periodic chain motifs are held into supra­molecular di-periodic supra­molecular layers by means of N—H⋯O hydrogen bonding between edn amide groups and unligated dibf carboxyl­ate O atoms. In turn, the supra­molecular layers are held by crystal packing forces into the full crystal structure of the title compound. [Image: see text]