(2,2'-Biquinoline-kappa2N,N')bis(nitrato-kappa2O,O')copper(II).

In the title monomer, [Cu(NO(3))(2)(C(18)H(12)N(2))], the six-coordinated Cu(II) atom lies on a twofold axis which bisects one of the ligands (a chelating biquinoline) and duplicates the remaining ligand, a chelating nitrate. The latter binds in a very asymmetric way, consistent with a Jahn-Teller distortion in the coordination polyhedron which, due to the triple chelation, is extremely distorted and difficult to describe in terms of any regular model.