摘要
利用循环伏安法研究了二取代对苯二胺(1),四取代对苯二胺(2)和二取代氨基酚(3)三类化合物以及它们的衍生物的电化学行为及其氧化产物的随后不可逆脱氨反应。 1类化合物在任何pH下的电化学氧化均为一步双电子转移反应,2类化合物为二步单电子转移反应;3类化合物在酸性和中性范围为一步双电子氧化在碱性溶液中为二步单电子转移反应。文中定量求算了不可逆随后化学反应的表观水解速率常数k_f,并进行了讨论。
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.
出处
《应用化学》
CAS
CSCD
北大核心
1990年第3期19-23,共5页
Chinese Journal of Applied Chemistry
关键词
取代对苯二胺
脱氨
电化学氧化
substituted phenylenediamines
deamination
electrochemical oxidation
