Crystal structure of di-μ-hydroxido-bis­{aqua­[ethyl (1,10-phenanthrolin-3-yl)phospho­nato-κ(2) N,N′]copper(II)} hepta­hydrate

In the title compound, [Cu(2)(OH)(2){C(12)H(7)N(2)(PO(3)C(2)H(5))}(2)(H(2)O)(2)]·7H(2)O, two Cu(2+) cations are bridged by two hydroxide groups, forming a centrosymmetric binuclear complex. Each Cu(2+)cation is further coordinated by the N atoms of a bidentate ethyl (1,10-phenanthrolin-3-yl)phospho­nate anion and a water mol­ecule in a square-pyramidal geometry. In the crystal, a network of O—H⋯O hydrogen bonds involving the P(O)(O(−))(OEt) groups, bridging hydroxyl groups, coordinated and uncoordinated water mol­ecules generates a three-dimensional supra­molecular structure. The ethyl group exhibits disorder and was modelled over three sites with occupancies of 0.455, 0.384 and 0.161.