A series of binucleating ligands with fully conjugated .pi.-systems have been synthesized. Homobinuclear copper(II) complexes of the form [(Cu(dien)ClO/sub 4/)/sub 2/L]-(ClO/sub 4/)/sub 2/, where dien is diethylenetriamine and L is binucleating ligand, were prepared. Mononuclear complexes, with structure similar to that of the preceeding compounds, [Cu(dien)L'(ClO/sub 4/)](ClO/sub 4/) were synthesized as reference compounds. The infrared spectra, electronic spectra and magnetic properties were studied. The inductive effect, steric effect and the effect of the length of the conjugated .pi.-system on the magnetic exchange interaction between the two copper ions are discussed. The electrochemical properties of these complexes were investigated by cyclic voltammetry. The copper ions showed the cooperative phenomena and a quasi-reversible sequential transfer of two electrons at the same potential.
中國化學會會誌=Journal of the Chinese Chemical Society 32(4)，頁431-438