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A kinetics study on reactions of C 6 H 5 O with C 6 H 5 O and O 3 at 298 k
Author(s) -
Tao Zhining,
Li Zhuangjie
Publication year - 1999
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/(sici)1097-4601(1999)31:1<65::aid-kin8>3.0.co;2-j
Subject(s) - chemistry , kinetics , quantum mechanics , physics
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 1 = (1.49 ± 0.53) × 10 −11 cm 3 molecule −1 s −1 defined by d [C 6 H 5 O]/ dt =−2 k 1 [C 6 H 5 O] 2 . The rate constant for the C 6 H 5 O reaction with O 3 was measured to be k 2 = (2.86 ± 0.35) × 10 −13 cm 3 molecule −1 s −1 , 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 + C 6 H 5 O, NO, and NO 2 were also investigated, and (C 6 H 5 O) 2 ( m / e = 186), C 6 H 5 O(NO) ( m / e = 123), and C 6 H 5 O(NO 2 ) ( m / e = 139) adducts were observed as products for the reactions of C 6 H 5 O with itself, NO, and NO 2 , respectively. © 1999 John Wiley & Sons, Inc. Int J Chem Kinet 31: 65–72, 1999