Syntheses, structures, and magnetic properties of ethoxy-bridged dinuclear iron(III) complexes containing tetradentate ligands

• Novel ligand, N-(bis(2-pyridylmethyl)amino)-2-methylpropan-2-ol, is prepared.
• Ethoxy-bridged dinuclear Fe(III) complexes (1 and 2) are prepared and characterized.
• 1 and 2 are shown 2-D and 1-D supramolecular structures, respectively.
• The magnetic coupling of 2 has stronger antiferromagnetically than that of 1.

Dinuclear iron(III) complexes, [(phenO)Fe(SO4)]2·2CH3OH (1) and [(bpmapO)Fe(NO3)]2(NO3)2·3CH3OH (2) have been prepared by the reaction of phenOH/bpmapOH and FeSO4·7H2O/Fe(NO3)3·9H2O in methanol, respectively (phenOH = N-(2-pyridylmethyl)-N′-(2-hydroxyethyl)ethylenediamine, bpmapOH = N-(bis(2-pyridylmethyl)amino)-2-methylpropan-2-ol). Both complexes are ethoxy-bridged dinuclear species and the iron(III) ions in 1 and 2 have distorted octahedral geometries. Both complexes show strong antiferromagnetic interactions through the bridged ethoxy groups within the dimeric units.

Ethoxy-bridged dinuclear iron(III) complexes with tetradentate ligands have been prepared and structurally characterized. The iron(III) ions in the complexes have distorted octahedral geometries. Variable-temperature magnetic susceptibility measurements reveal that both complexes show strong antiferromagnetic interactions through the bridged ethoxy groups.Figure optionsDownload as PowerPoint slide