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Rate constants for the gas-phase reactions of Cl atoms with a series of hydrofluorocarbons and hydrochlorofluorocarbons at 298 ± 2 K

✍ Scribed by Ernesto C. Tuazon; Roger Atkinson; Stephanie B. Corchnoy

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
522 KB
Volume
24
Category
Article
ISSN
0538-8066

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✦ Synopsis

A relative rate method has been used to determine rate constants for the gas-phase reactions of a series of hydrofluorocarbons (HFCs) and hydrochlorofluorocarbons (HCFCs) at 298 t 2 K and atmospheric pressure of air. Based on a rate constant for the reaction of the C1 atom with CH, of (1.0 ? 0.2) x cm3 molecule-' s-' at 298 K, the following C1 atom reaction rate constants (in units of cm3 molecule-' s-') were obtained: CH3F 340 2 70; CH3CHF2, 240 ?

2.4 t 0.5; CHFZCl, 2.0 t-0.4; CHZFCF3, 1.6 t 0.3; CH3CF2C1, 0.37 % 0.08; and CHFzCF3, 0.24 ? 0.05. These C1 atom reaction rate constants are compared with literature data and with the corresponding OH radical reaction rate constants.

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