Control of the intramolecular magnetic interaction by the spin polarization of dπ-electrons: ferromagnetic interaction between iron centres through an organic bridging ligand

Abstract

The magnetic susceptibility of the dinuclear iron(III) complex [Fe₂(bpmar)(H₂O)₄](NO₃)₄·3H₂O {H₂bpmar–4,6-bis[N, N-bis(2′-pyridylmethyl)aminomethyl]-2-methylresorcinol}, in which the bridging ligand was designed by considering the topological relationship of the network of d_π spins to the bridging ligands, has indicated a ferromagnetic interaction [J=+0.62(3) cm^–1 and g= 1.956(4)] between the two metal centres.