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A kinetics study on reactions of C6H5O with C6H5O and O3 at 298 k

✍ Scribed by Zhining Tao; Zhuangjie Li

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 166 KB
Volume: 31
Category: Article
ISSN: 0538-8066
DOI: 10.1002/(sici)1097-4601(1999)31:1<65::aid-kin8>3.0.co;2-j

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✦ Synopsis

Kinetics for reactions of phenoxy radical, C 6 H 5 O, with itself and with O 3 were examined at 298 K and low pressure (1 Torr) using discharge flow coupled with mass spectrometry (DF/MS). The rate constant for the phenoxy radical self-reaction was determined to be k

The rate constant for the C 6 H 5 O reaction with O 3 was measured to be k 2 ϭ (2.86 Ϯ 0.35) ϫ 10 Ϫ13 cm 3 molecule Ϫ1 s Ϫ1 , which may be a lower limit value. Because of much higher atmospheric abundance of ozone than that of both NO and phenoxy, the reaction of C 6 H 5 O with ozone may represent the principal fate of the phenoxy radical in the atmosphere. Products from reaction of C 6 H 5 O ϩ C 6 H 5 O, NO, and NO 2 were also investigated, and (C 6 H 5 O) 2 (m/e ϭ 186), C 6 H 5 O(NO) (m/e ϭ 123), and C 6 H 5 O(NO 2 ) (m/e ϭ 139) adducts were observed as products for the reactions of C 6 H 5 O with itself, NO, and NO 2 , respectively.

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