With regard to molecular reactivity, the characteristics x is evaluated experimentally by the yield of products; differences in the values of x dir and x hom in direct and HOMEC electrolysis, at once indicate the presence of electrode effects. By changing the x dir / x hom ratio under targeted changes in conditions, one can obtain information about the nature of the electrode effects. The important issue here is to find the extent and profile of the effective near-electrode zone x = f(L) using NELTO. Accurate calculation of L´s values, under conditions of conventional preparative electrolysis with the uncontrolled mass transfer, encounters considerable difficulties; a first rough estimation we made on the basis of polarographic measurements (see above).