Synthesis and Characterization of Three Novel Ferromagnetic Copper(II) Binuclear Complexes Bridged by Phthalato

Three novel copper(II) binuclear complexes with phthalate dianion as bridging ligand have been obtained, namely [Cu2(phth)(L)4](ClO4)2, where phth denotes the phthalate dianion and L represents 1,10-phenanthroline (abbreviated as phen), 2,2_-bipyridine (bpy) or 4,4_-dimethyl-2,2_-bipyridine (Me2bpy). Meanwhile, the IR, electronic spectra, ESR spectra and the temperature-dependent magnetic susceptibility of the three complexes were analyzed. The results of the magnetic analyses show a weak ferromagnetic coupling between the paramagnetic ions in all complexes studied.