“…In these cases the redox activity involves the ligands rather than the chromium ion. The synthesis and characterisation of bis(o-quinone)(bipyridine)chromium(III) complexes have been described [11], where the metal ion, chromium(III), is kinetically stable and not directly involved in the redox activity. Dissociation becomes significant only when the ligands are in a fully oxidized benzoquinone form [11].…”