期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
卷号：4
期号：8
页码：6802
DOI：10.15680/IJIRSET.2015.0408014
出版社：S&S Publications
摘要：Kinetic investigation on the oxidation of one of the aminotriazole derivatives, namely N,N-dimethyl-N’-(4H-1,2,4-triazol-3-yl) formamidine (ATF) by permanganate ion in alkaline medium has been performed at a constantionic strength of 0.1 mol dm-3 and at 25 oC. The progress of the reaction was followed spectrophotometrically. Bothspectroscopic and kinetic evidences reveal formation of a 1:1 intermediate complex between the oxidant and substrate.The influence of pH on the oxidation rate indicated that the reaction is base-catalyzed. The reaction shows first orderdependence with respect to [MnO4-], and fractional-first order dependences on both [ATF] and [OH-]. Increasing ionicstrength and dielectric constant did not affect the reaction rate. Addition of small amounts of alkali-metal ion catalystswas found to accelerate the oxidation rate and the order of effectiveness of the ions was: Li+ > Na+ > K+. The finaloxidation products of ATF were identified as 3-aminotriazole, dimethyl amine and carbon dioxide. A plausible reactionmechanism consistent with the kinetic observations is proposed, and the reaction constants involved in the differentsteps of the mechanism have been evaluated. The activation parameters with respect to the slow step of the reaction,along with thermodynamic quantities of the equilibrium constants are calculated and discussed.
