μ-Adipato-bis­[chlorido(2,2′:6′,2′′-terpyridine)­copper(II)] tetra­hydrate

In the title compound, [Cu(2)(C(6)H(8)O(4))Cl(2)(C(15)H(11)N(3))(2)]·4H(2)O, the dinuclear copper complex is located on a crystallographic inversion centre. Each Cu atom is in a distorted square-pyramidal coordination environment, with one O atom of an adipate dianion and three N atoms from the 2,2′:6′,2′′-terpyridine ligand occupying the basal plane, and one chlorine in the apical site. In addition, there is weak Cu—O inter­action opposite of the chlorine with a distance of 2.768 (1) Å. The adipate ligand adopts a gauche–anti–gauche conformation. The inter­stitial water mol­ecules form hydrogen-bonded tertramers that are connected to the complexes via O—H⋯O and O—H⋯Cl hydrogen bonds, thus leading to the formation of tightly hydrogen-bonded layers extending perpendicular to the b-axis direction.