Fe nuclear resonance vibrational spectroscopic studies of tetranuclear iron clusters bearing terminal iron(iii)-oxido/hydroxido moieties.

Fe nuclear resonance vibrational spectroscopy (NRVS) has been applied to study a series of tetranuclear iron ([Fe]) clusters based on a multidentate ligand platform (L) anchored by a 1,3,5-triarylbenzene linker and pyrazolate or (butylamino)pyrazolate ligand (PzNH Bu). These clusters bear a terminal Fe(iii)-O/OH moiety at the apical position and three additional iron centers forming the basal positions. The three basal irons are connected with the apical iron center a μ-oxido ligand.