One‐Electron Oxidation of Aryltriazenes to Radical Cations

Abstract

Abstract 3,3‐Dimethyl‐1‐(4‐R‐phenyl)‐ [R = (CH 3 ) 2 N, C 2 H 5 O, CH 3 O, CH 3 ; 3 ] and 3‐Methyl‐1‐(4‐R 1 ‐phenyl)‐3‐(4‐R 2 ‐phenyl)triazenes [R 1 = (CH 3 ) 2 N, CH 3 O, NO 2 , R 2 = CH 3 O, H, 4 ] are oxidized electrochemically and chemically to their one‐electron oxidation products. Cyclic voltammograms of the triazenes are discussed, and ESR as well as UV/Vis spectra of the radical cations are presented. The stability of the triazene radical cations generated depends on the substituents on the aryl rings. 4‐R‐Benzenediazonium ions are identified as one of the decay products of the radical cations by means of cyclic voltammetry and UV/Vis spectroelectrochemistry.