A new N6 hexadentate ligand and a novel heptacoordinated N6O-type Fe(III) compounds: Synthesis, characterization and structure of [Fe(dimpyen)(OH)](A)2 (A = PF6− or ClO4−)

► The four step syntheses of a new N6 donor set ligand, dimpyen is devised. ► The reaction with Fe(II) gives off a novelheptacoordinated iron(III) complex. ► Magnetic studiesconfirm a high-spin iron (III) species in all the temperature range considered. ► Cyclic voltammetry confirm a reversible system Fe(III) species, with a very low redox potential. ► The change of the metal ion oxidation state can be explained in terms of the redox properties of the system.