With the use of the model complexes [(PQ)FeCl(CH3O)](+), [(phen)FeCl(CH3O)](+), and [(PQ)(phen)FeCl(CH3O)](+), where PQ is 9,10-phenanthraquinone and phen is 1,10-phenanthroline, the reactivity of phenanthraquinone in complexes with iron(III) is investigated