Affiliation:
1. Max-Planck-Institut für Strahlenchemie. Stiftstraße 34–36. D-4330 Mülheim a.d. Ruhr
Abstract
Hydroxyl radicals (and H atoms) generated in the radiolysis of N2O-containing water add to ethylene forming β-hydroxyethyl radicals (and ethyl radicals). In the presence of oxygen these are converted into the corresponding peroxyl radicals which decay bimolecularly (2k = 2 x 108 M-1s-1) as measured by pulse radiolysis. The major products (G values in brackets) are glycolaldehyde (3.3). formaldehyde (1.6), ethylene glycol (0.8), acetaldehyde (0.5). organic peroxidic material (0.5). and hydrogen peroxide (2.4) (dose rate 0.26 Gy s-1, pH 5.6). A material balance has been obtained with respect to the primary water radicals (6.0) and oxygen uptake (4.8). The products and their yields can be accounted for if in the rate determining step atetroxide is formed which decomposes via three major pathways leading to: (i) H2O2 and two molecules of glycolaldehyde (ca. 45%), (ii) O2, glycolaldehyde and ethylene glycol (ca. 30%). and (iii) O2. two molecules of formaldehyde and two CH2OH radicals (ca. 15%). A 1,2-H shift of intermediate oxyl radicals is unimportant in this system.
Cited by
20 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献