[μ-N,N,N',N'-Tetra-kis(2-pyridyl-meth-yl)butane-1,4-diamine]-bis-[dichlorido-copper(II)] trihydrate

The title dinuclear copper complex, [Cu(2)Cl(4)(C(28)H(32)N(6))]·3H(2)O, is located on a crystallographic inversion center. The unique Cu(II) ion is coordinated in a slightly distorted square-pyramidal environment in which the N atoms of the dipicolyl-amine group and a chloride ligand form the basal plane. The apical position is occupied by a second chloride atom. While the Cu-N distances of the pyridine N atoms are the same within expermental error, the Cu-N distance to the tertiary N atom is slightly elongated. The apical Cu-Cl distance is elongated due to typical Jahn-Teller distortion. One of the water O atoms was refined as disordered over two sites with occupancies 0.734 (17):0.266 (17) and another with half occupancy. H atoms for the disordered solvent atoms were not included in the refinement.