Chinese Journal of Applied Chemistry ›› 1990, Vol. 0 ›› Issue (3): 19-23.

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THE ELECTROCHEMICAL OXIDATION OF PHENYLENEDIAMINES

Liu Chunyan, Ren Xinmin   

  1. Institute of Photographic Chemistry, Academia Sinica, Beijing 100101
  • Received:1989-05-03 Revised:1989-10-09 Published:1990-06-10 Online:1990-06-10

Abstract: The electrochemical oxidation of phenylenediamines with a following irreversibie deami-nation reaction was studied by cyclovoltammetry. Within the pH studied, there is only oneoxidation Wave for N,N-diethylphenylenediamine(1a), but two oxidation waves for N,N,N,N-tetrathlphenylenediamine(2a).In acidic media, the electrochemical oxidation of N,N-diethylaminophenol(3a)proceeds via two-electron transfer, but at higher pH two singleelectron transfer are involved. The rate constant of the deamination reaction kf was deter-mined as a function of pH, the mechanism of deamination was discussed.

Key words: substituted phenylenediamines, deamination, electrochemical oxidation