Bis(μ-4-chloro-2-oxidobenzoato)bis­[(1,10-phenanthroline)copper(II)] dihydrate

The structure of the the title compound, [Cu(2)(C(7)H(3)ClO(3))(2)(C(12)H(8)N(2))(2)]·2H(2)O, consists of a dimeric unit involving a planar Cu(2)O(2) group arranged around an inversion center. The coordination sphere of the Cu(II) atom can be described as an elongated distorted square pyramid where the basal plane is formed by the two N atoms of the 1,10-phenanthroline mol­ecule and the two O atoms of the hydroxy­chloro­benzoate (hcbe) anion. The long apical Cu—O distance of 2.569 (2) Å involves the O atom of a symmetry-related hcbe anion, building up the dinuclear unit. Each dinuclear unit is connected through O—H⋯O hydrogen bonds involving two water mol­ecules, resulting in an R (4) (2)(8) graph-set motif and building up an infinite chain parallel to (10[Image: see text]). C—H⋯O inter­actions further stabilize the chain.