Structural aspects of some 2:1 dipyridylamine complexes of some copper(II) salts: An interesting new polymorph of the binuclear carbonate/perchlorate tetrahydrate adduct

A number of studies of adducts of the form [(dpyam)2CuX]X′(·nH2O) are recorded, among them an interesting new form of binuclear [(dpyam)2Cu(O · CO · O)Cu(dpyam)2](ClO4)2 · 4H2O, in which the (non-disordered) carbonate unit links a pair of copper atoms in distinctly different coordination environments.