ELECTROCHEMICAL-BEHAVIOR OF A MACROCYCLIC DIIMINE CROWN-ETHER - AZA-4,9(10)-CIS-DIIMINO-1,13-DIOXACYCLOPENTADECANE

A macrocyclic diimine crown ether, aza-4,9(10)-cis-diimino-1,13-dioxac yclopentadecane (O-en-N-tn), was synthesized and its electrochemical b ehavior reported. Reduction of -C=N- bonds was studied in an ethyl alc ohol + water mixture (1:5 v/v) using sampled current polarographic, di fferential pulse polarographic, cyclic voltammetric, chronoamperometri c and chronocoulometric techniques. A mechanism for the electrode reac tion was proposed. The diffusion coefficient, heterogeneous rate const ant and transfer coefficient of the electrode reaction were determined by choronoamperometric measurements. Adsorptional characteristics of the O-en-N-tn molecule on a mercury electrode were studied and the amo unt of molecules adsorbed was found to be of the order of 10(-12) mol cm(-2).