SYNTHESIS AND CHARACTERISATION OF OXALATO-BRIDGED HOMOBINUCLEAR (COPPER-COPPER) AND HETEROBINUCLEAR (COPPER-ZINC/NICKEL) COMPLEXES WITH DIETHYLENETRIAMINE AS CAPPING LIGAND

摘要

X-band electron paramagnetic resonance (e.p.r.),magnetic and optical absorption spectra of the oxalato-bridged complexes [(dien)Cu-Ox-Cu(dien)](BPh_4)_2,[(dien)Cu-Ox-Zn(dien)](BPh_4)_2,[(dien)Cu-Ox-Ni(dien)](BPh_4)_2 where Ox-oxalate ion,and dien-diethylenetriamine have been described.E.p.r.spectra of the polycrystalline complexes have been studied at room temperature and also at liquid nitrogen temperature.Magnetic susceptibility measurements were carried out on a Gouy balance at room temperature.Superoxide dismutase activity have also been measured and compared with the reported complexes.