Poly[[[μ(3)-3-(2-carboxyl­atophen­yl)propionato][μ(2)-N,N′-(ethane-1,2-di­yl)bis­(pyridine-4-carbox­amide)]copper(II)] monohydrate], a layered coordination polymer with (4,4) topology

In the title compound, {[Cu(C(10)H(8)O(4))(C(14)H(14)N(4)O(2))]·H(2)O}( n ), the Cu(II) cations are coordinated in a square-pyramidal fashion, with trans pyridyl-N donor atoms from two N-(2-(pyridin-3-yl­amino)­eth­yl)isonicotinamide (pein) ligands in the basal plane. The other three coordination sites are taken up by carboxyl­ate O-atom donors from three different 3-(2-carb­oxy­phen­yl)propionate (cpp) ligands. The central ethyl­enedi­amine segments of the pein ligands are disordered equally over two sets of positions. {Cu(2)O(2)} 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 inter­layer hydrogen-bonding inter­actions. [Image: see text]