灭幼脲(Ⅲ)在模拟大气条件下光解行为的研究

研究了灭幼脲(Ⅲ)在模拟大气条件下的光解行为,测定了在不同气氛环境中灭幼脲(Ⅲ)的反应速率.结果表明,灭幼脲(Ⅲ)在氮气及空气中的光解为一级反应,其反应速率常数分别为:0.00703h^-1和0.0109h^-1;在氧气中近似二级反应,其速率常数为0.00445h^-1(mg/g)^-1.其主要光解产物为:对氯苯胺,对氯苯基异氰酸酯,邻氯苯甲酰胺,对氯苯基脲和N—(邻氯苯甲酰基)对氯苯胺.根据产物组成,建议了可能的反应历程.

STUDY ON THE PHOTODECOMPOSITION OF BENZAMIDE, 2-CHLORO-N-(((4-CHLOROPHENYL) AMINO) CARBONYL) UNDER SIMULATED ATMOSPHERIC CONDITION

The photoreaction of 2-chloro-N((4-chlorophenyl)amino)carbon-yl) benzamide in simulated atmosphere has been studied in this paper. The rate constants and half-lives of this compound in nitrogen, air and oxygen, upon irradiation with xenon lamp, have beenmeasured. The statistical treatment of experimental results indicates that the photoreaction in nitrogen and air is of the first order, while in oxygen is closer to that of second order. The main products of photodecomposition of this compound found are 2-chloro-ben-zamide, 4-chlorophenyl urea, 4-chloro-aniline, and 2-chloro-N-(chlorophenol)-benzamide etc. , and the possible pathways of photo-degradation are suggested.