the study of electrochemical behavior of mono and dinuclear co(iii) complexes, trans-[pyco((do)(doh)pn)(l)]pf6 and [{pyco((do)(doh)pn)}2(μ-dicyd)](pf6)2

electrochemical behavior of the new mono and dinuclear co (iii)  complexes of  the types trans-[pyco((do)(doh)pn )(l)]pf6   and [{py co((do)(doh)pn)}2 (μ-dicyd)] (pf6)2   have been studied in acetonitrile solution.  all the  mono nuclear complexes  show two quasi- reversible reduction couples associate  to co(iii/ii)and  co(ii/i). each of these redox couples split to two  one electron  waves in dinuclear complex.