The hydrolysis rate constants of 3-(N-methylcarbamoyl)-1,3-diphenyltriazene (I), 3-(N-phenylcarbamoyl)-1,3-diphenyltriazene (II) and 3-acetyl-1,3-diphenyltriazene (III) have been determined in aqueous media within pH 0 to 14, Ho to 3 and H- to 15. The hydrolysis at pH < 2 and pH > 11 show specific acid and base catalysis, respectively, whereas within pH 2 to 11 non-catalyzed hydrolysis takes place. Activation parameters of the non-catalyzed and catalyzed hydrolysis have been determined. Quantum-chemical calculation of 3-carbamoyltriazene (IV) has been carried out by the MINDO/2 method. Hydrolysis mechanism of the studied compounds is suggested for the non-catalyzed, specific acid catalyzed and specific base catalyzed hydrolysis.
已确定在pH 0至14、H
o至3和H
-至15的
水介质中3-(N-甲基
氨甲酰)-1,3-二苯基
三氮烯(
I)、3-(N-苯基
氨甲酰)-1,3-二苯基
三氮烯(
II)和3-乙酰基-1,3-二苯基
三氮烯(
III)的
水解速率常数。在pH < 2和pH > 11时,显示出特定的酸和碱催化,而在pH 2至11之间发生非催化
水解。已确定了非催化和催化
水解的活化参数。通过MINDO/2方法对3-
氨甲酰基
三氮烯(
IV)进行了量子
化学计算。提出了所研究化合物的非催化、特定酸催化和特定碱催化
水解的
水解机制。