Interaction of hexacyanoferrate(III) with some copper(II) complexes

The interaction between hexacyanoferrate(III) and some copper complexes of different geometry was studied. In solution, and in the presence of coordination unsaturation of copper, 1:1 and 2:1 Cu:Fe adducts formed and were characterized by the absence of any copper electron paramagnetic resonance (EPR) signal. The magnetic susceptibility of the 1:1 adducts is essentially equal to the sum of those due to the parent compounds. Solid state studies confirm the solution data. In the light of the present results the absence of the EPR signal of [Fe(CN)₆]^3?-treated galactose oxidase is discussed.