the electrochemical and spectroscopic studies of trans-[lco((do)(doh)pn)l'] complexes

six new complexes of the type trans-[lco((do)(doh)pn)l'] where (do)(doh)pn= n2, n2'-propanediolbis (2,3-butanedione 2-imine 3-oxime), l-cl¯ and l'=mono-anaion of phenylcyanamide (pcyd), 2,5-dichlorophenylcyanamide (2,5-cl2 pcyd), 2,4-dimethyl pehylcyanamide (2,4-me2 pcyd) and l=l'=pcyd, 2,5-cl2 pcyd, 2,4-me2 pcyd, have been synthesized and characterized by elemental analysis, spectroscopy and cyclic voltammetry. the electronic absorption spectra of the co(iii) complexes show two low-energy ligand to metal charge transfer band that are associated with co(iii)-ncn chromophore. the cyclic voltammogrm of these complexes exhibit two subsequent quasi-reversible reduction couple repated to co(iii)/co(ii)  and co(ii)/co(i), respectively.