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A temperature dependent kinetic study of the reaction of the hydroxyl radical with CH 3 Br
Author(s) -
Zhang Zhengyu,
Saini Rameshwar D.,
Kurylo Michael J.,
Huie Robert E.
Publication year - 1992
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/92gl02929
Subject(s) - arrhenius equation , reaction rate constant , hydroxyl radical , kinetic energy , atmospheric temperature range , troposphere , chemistry , radical , gas phase , reaction rate , thermodynamics , kinetics , activation energy , meteorology , organic chemistry , physics , catalysis , quantum mechanics
Rate constants have been measured for the gas phase reaction of the hydroxyl radical (OH) with CH 3 Br over the temperature range 250 to 400 K. The Arrhenius expression k = 5.79 × 10 −12 exp(‐1560/T) cm 3 molecule −1 s −1 was derived from the kinetic data. From the rate constant at 277 K, the tropospheric lifetime of CH 3 Br with respect to reaction with OH is estimated to be 2.2 years and the overall atmospheric lifetime to be 2.1 years.