Reactivity of superoxide toward iron(II) complexes with pentadenate and hexadentate ligands derived from cyclononane

Electrochemical, spectrophotochemical and spectroscopic techniques are capable of characterizing the reactivity of superoxide with iron II complexes. The complexes have pentadentate ligands and hexadentate ligands. Electrically conductive polymers on the electrode surface at negative potentials exist and is indicated by the repetitive cyclic voltammograms of the two complexes. The polymers are formed under aerobic conditions which are induced by hypervalent iron species.