Admittance measurements of adsorption properties of 2,2′-bipyridine complexes: Part II. Iron(II), cobalt(II) and nickel(II) complexes inacetonitrile

Whereas trisbipyridine complexes of iron(II), cobalt(II) and nickel(II) yield successiveone-electron and reversible waves in d.c. polarographic measurements in acetonitrile, the admittance measurements indicate clearly that the charge transfer reaction is coupled with adsorption. Various tests for the detection of adsorption were used and the extent of adsorption of reactant or products in relation with charge transfer kinetics is discussed.