Reaction of CH3O2+HO2 in air at 295 K: A product study
โ Scribed by Timothy J. Wallington; Steven M. Japar
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 562 KB
- Volume
- 167
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Fourier transform infrared spectroscopy was used to identify and quantify methylhydroperoxide as the dominant product of the gas phase reaction of methylperoxy radicals with hydroperoxy radicals. At 295 K, and 700 Torr total pressure of air, 92 f 8% of the reaction of CH102 with HO2 proceeds via CHa02 + HO*-+ CH,OOH + Oz. Results are discussed with respect to the previous kinetic and mechanistic studies of peroxy radicals and computer models of atmospheric chemistry.
๐ SIMILAR VOLUMES
Fourier transform infrared spectroscopy was used to identify and quantify products of the self-reaction of chloroethylperoxy radicals, CH2C1CH20z, formed in the photolysis of Cl&H4 mixtures in 700 Torr total pressure of synthetic air at 295 K. From these measurements, branching ratios for the reacti
Fourier transform infrared spectroscopy was used to identify CHrOCHO and CH,OCH,OOH as products of the gas-phase reaction of CH,0CH202 radicals with HO1 radicals. At 700 Torr and 2952 2 K, branching ratios of k,./k, =0.53 f 0.08 and klb/ k, =0.40\* 0.04 were established. Quoted errors are 2 standard
Constants of the rawions of Cl with HIOz. IX&, 03, CH4, and HNC)J wertt mezxured at 295 K using a flaw discharge-mass spectrometric method. The rate consmts are, WpectiveIy, (6.2 ?c I.51 X 10qzS, (32&) x 10"tl, (1.3 -+. 0.3) X lo-'t, (1.2 ?t 0.3) X 10-13, and (6.8 t 3.4) X lO-is cm3/s.
The reactions of CH3 radicals with O(3P) and 0 2 have been studied at 295 K in a gas flow reactor sampled by a mass spectrometer. For the reaction between CH3 and 0, conditions were such that [O] >> [CH3] and the methyl radicals decayed under pseudo-first-order conditions giving a rate coefficient o
Using Fourier transform infrared spectroscopy, the ethene yield from the reaction of C2H5 radicals with O2 has been determined to be 1.50 ? 0.098, 0.85 ? 0.118, and < O . l % at total pressures of 25, 50, and 700 torr, respectively. Additionally, the rate constant of the reaction of CzHs radicals wi