A gas-phase kinetic study of the reaction between bromine monoxide and methylperoxy radicals at atmospheric temperatures.
The rate constant of the reaction of BrO with CH(3)O(2) was determined to be k1 = (6.2 +/- 2.5) x 10(-12) cm3 molecule(-1) s(-1) at 298 K and 100-200 Torr of O2 diluent. Quoted uncertainty was two standard deviations. No significant pressure dependence of the rate constants was observed at 100-200 Torr total pressure of N2 or O2 diluents. Temperature dependence of the rate constants was further investigated over the range 233-333 K, and an Arrhenius type expression was obtained for k1 = 4.6 x 10(-13) exp[(798 +/- 76)/T] cm3 molecule(-1) s(-1). The product branching ratios were evaluated and the atmospheric implications were discussed.
Enami
Shinichi
S
Department of Molecular Engineering, Kyoto University, Kyoto 615-8510, Japan.
Yamanaka
Takashi
T
Nakayama
Tomoki
T
Hashimoto
Satoshi
S
Kawasaki
Masahiro
M
Shallcross
Dudley E
DE
Nakano
Yukio
Y
Ishiwata
Takashi
T
D017605:Bromine Compounds / Q000737:chemistry*; D003198:Computer Simulation; D005609:Free Radicals / Q000737:chemistry; D005740:Gases / Q000737:chemistry*; D007700:Kinetics; D008745:Methylation; D010087:Oxides / Q000737:chemistry*; D010545:Peroxides / Q000737:chemistry*; D013696:Temperature
D017605:Bromine Compounds; D005609:Free Radicals; D005740:Gases; D010087:Oxides; D010545:Peroxides; C521367:bromine monoxide; C049375:perhydroxyl radical