Aquabis(1-formyl-2-naphtholato-? 2 O , O ')copper(II)

In the title complex, [Cu(C11H7O2)2(H2O)], the CuII atom exists in a square-pyramidal environment, coordinated by four O atoms from two formyl­naphtholate ligands and one water O atom. Mol­ecules are linked by weak Cu⋯O inter­actions and hydrogen bonding into a two-dimensional network.