catena-Poly[[di-aqua-bis-(1,3-di-hydro-3-oxo-isobenzo-furan-1-acetato)-copper(II)]-μ-N,N'-(ethane-1,2-di-yl)dinicotinamide].

The title compound, {[Cu(C10H7O4)2(C14H14N4O2)(H2O)2]n, contains octa-hed-rally coordinated CuII ions ligated by two bis-(1,3-di-hydro-3-oxo-1-isobenzo-furan-acetate (dibf) ligands and two trans water mol-ecules, linked by N,N'-(ethane-1,2-di-yl)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 supra-molecular di-periodic supra-molecular layers by means of N-H⋯O hydrogen bonding between edn amide groups and unligated dibf carboxyl-ate O atoms. In turn, the supra-molecular layers are held by crystal packing forces into the full crystal structure of the title compound.