Poly[[[μ3-3-(2-carboxyl-atophen-yl)propionato][μ2-N,N'-(ethane-1,2-di-yl)bis-(pyridine-4-carbox-amide)]copper(II)] monohydrate], a layered coordination polymer with (4,4) topology.

In the title compound, {[Cu(C10H8O4)(C14H14N4O2)]·H2O}n, the CuII cations are coordinated in a square-pyramidal fashion, with trans pyridyl-N donor atoms from two N-(2-(pyridin-3-yl-amino)-eth-yl)isonicotinamide (pein) ligands in the basal plane. The other three coordination sites are taken up by carboxyl-ate O-atom donors from three different 3-(2-carb-oxy-phen-yl)propionate (cpp) ligands. The central ethyl-enedi-amine segments of the pein ligands are disordered equally over two sets of positions. {Cu2O2} rhomboid clusters are connected into [Cu(cpp)(pein)]n (4,4) coordination polymer grids by the full span of the cpp and pein ligands. Individual layer motifs stack in an AAA pattern along the a axis by means of inter-layer hydrogen-bonding inter-actions.