Diaqua-(1,4,8,11-tetra-aza-cyclo-tetra-decane-κN,N,N,N)copper(II) didodeca-noate dihydrate.

The title compound, [Cu(C(10)H(24)N(4))(H(2)O)(2)][CH(3)(CH(2))(10)CO(2)](2)·2H(2)O, consists of one cationic copper(II) complex, two dodeca-noate anions and two water solvent mol-ecules. The Cu(II) atom is located on an inversion center and is chelated by the four aza N atoms of the neutral 1,4,8,11-tetra-aza-cyclo-tetra-decane (cyclam) ligand and by two water mol-ecules in axial positions, giving an octa-hedral coordination geometry, distorted as a consequence of the Jahn-Teller effect. The uncoordinated water mol-ecules link the complex cations and the dodeca-noate counter-ions through O-H⋯O hydrogen bonding, forming a layer structure parallel to (001). Inter-molecular N-H⋯O inter-actions also occur.