The Electrochemical and Spectroscopic Studies of trans-[LCo((DO)(DOH)pn)L'] Complexes

Abstract

<em>Six new complexes of the type trans-[LCo((DO)(DOH)pn)L'] where (DO)(DOH)pn= N², N^2'-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.</em>