In:
International Journal of Chemical Kinetics, Wiley, Vol. 37, No. 12 ( 2005-12), p. 763-769
Abstract:
The rate constants for the gas‐phase reactions of ground‐state oxygen atoms with CF 2 CFCl (1), ( E / Z )‐CFClCFCl (2), CFClCH 2 (3), and ( E / Z )‐CFHCHCl (4) have been measured directly using a discharge flow tube coupled to a chemiluminescence detection system. The experiments were carried out under pseudo‐first‐order conditions with [O 3 P)] 0 ≪ [ethene] 0 . The temperature dependences of the reactions were studied for the first time in the range 298–359 K. The proposed Arrhenius expressions (in units of cm 3 molecule −1 s −1 ) were k 1 = (1.07 ± 0.32) × 10 −11 exp{−(8000±1600)/RT}, k 2 = (0.56 ± 0.10) × 10 −11 exp{−(8700±500)/RT}, k 3 = (4.23 ± 1.25) × 10 −11 exp{−(12,700 ± 800)/RT}, and k 4 = (1.13 ± 0.62) × 10 −11 exp{−(10,500 ± 1500)/RT}. All the rate coefficients display a positive temperature dependence, which highlights the importance of the irreversibility of the addition mechanism for these reactions. Halogen substitution in the ethene is discussed in terms of reactivity with O( 3 P). © 2005 Wiley Periodicals, Inc. Int J Chem Kinet 37: 763–769, 2005
Type of Medium:
Online Resource
ISSN:
0538-8066
,
1097-4601
Language:
English
Publisher:
Wiley
Publication Date:
2005
detail.hit.zdb_id:
1480875-4
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