臭氧与甲基丙烯酸甲酯、丙烯酸甲酯和丙烯酸乙酯的气相反应动力学和产物。

Kinetics and products of gas-phase reactions of ozone with methyl methacrylate, methyl acrylate, and ethyl acrylate.

机构信息

ICARE-CNRS, 1C Avenue de la Recherche Scientifique, 45071 Orléans, Cedex 02, France.

出版信息

J Phys Chem A. 2010 Aug 19;114(32):8376-83. doi: 10.1021/jp104451v.

PMID:20701345

Abstract

The kinetics and products of the gas-phase reactions of ozone with methyl methacrylate, methyl acrylate, and ethyl acrylate have been investigated at 760 Torr total pressure of air and 294 +/- 2 K. The rate coefficients obtained (in cm(3) molecule(-1) s(-1) units) were as follows: k(methyl methacrylate) = (6.7 +/- 0.9) x 10(-18), k(methyl acrylate) = (0.95 +/- 0.07) x 10(-18), and k(ethyl acrylate) = (1.3 +/- 0.1) x 10(-18). In addition to formaldehyde being observed as a product of the three reactions, the other major reaction products were methyl pyruvate from reaction of ozone with methyl methacrylate, methyl glyoxylate from reaction of ozone with methyl acrylate, and ethyl glyoxylate from reaction of ozone with ethyl acrylate. Possible reaction mechanisms leading to the observed products are presented and discussed.

摘要

臭氧与甲基丙烯酸甲酯、丙烯酸甲酯和丙烯酸乙酯在空气总压为 760 托和 294 +/- 2 K 的气相反应的动力学和产物已被研究。得到的速率系数（以 cm(3)分子(-1) s(-1)单位表示）如下：k(甲基丙烯酸甲酯) = (6.7 +/- 0.9) x 10(-18)，k(丙烯酸甲酯) = (0.95 +/- 0.07) x 10(-18)，k(丙烯酸乙酯) = (1.3 +/- 0.1) x 10(-18)。除了观察到三种反应均生成甲醛作为产物外，其他主要反应产物还有臭氧与甲基丙烯酸甲酯反应生成的甲基丙酮酸、臭氧与丙烯酸甲酯反应生成的甲基乙二醛和臭氧与丙烯酸乙酯反应生成的乙基乙二醛。提出并讨论了可能导致观察到的产物的反应机制。