Magnetic ordering in iron(II) complexes due to a 2D network of hydrogen bonds

Abstract

The magnetic properties of two octahedral iron(II) complexes with Schiff base like equatorial N2O2 coordinating ligands and methanol (MeOH) as axial ligand are reported. Both compounds [FeL1(MeOH)2] (1) and [FeL2(MeOH)2] (2) (with L1 = [3,3′]-[1,2- phenylenebis(iminomethylidyne)-bis(2,4-pentanedionato)(2-)-N,N′,O 2,O2′] and L2 - [E,E]-[{diethyl 2,2′-1,2- phenylenebis(iminomethylidyne)bis(3-oxo-3-phenylpropanato)} (2-)-N,N′,O3, O3′]) show a weak spontaneous magnetization below TC = 10 K. Results from X-ray structure analysis of 1 indicate, that this is due to 2D network of hydrogen bonds as previously discussed for a similar complex. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.