Diclofenac interactions: tetrakis[mu-2-(2,6-dichloroanilino)phenylacetato]-1:2 kappa 8O:O'-diacetone-1 kappa O,2 kappa O-dicopper(II)(Cu-Cu) acetaldehyde solvate.

The structure of the centrosymmetric dimeric copper(II) title compound, [Cu2(C14H10Cl2NO2)4(C3H6O)2] C2H4O, has been determined and compared with the structures of analogous O-bridged CuII dimers. Polarographic experiments on aqueous solutions containing a mixture of the CuII ion and diclofenac have been used to determine both the formation constant [1 (1) x 10(8)] and the solubility product [2 (1) x 10(-12)] of the complex.