The ultraviolet absorption spectra of the peroxy radicals derived from hydrochlorofluorocarbons 141b and 142b, (CFClzCHZOz and CFzClCHz02, respectively), and the kinetics of their self reactions have been studied in the gas phase at 298 K using a pulse radiolysis technique. Absorption cross sections
The UV absorption spectra and kinetics of the self reactions of CH2ClO2 and CH2FO2 radicals in the gas phase
β Scribed by Philippe Dagaut; Timothy J. Wallington; Michael J. Kurylo
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 583 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0538-8066
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β¦ Synopsis
The ultraviolet absorption spectra of chloromethylperoxy and fluoromethylperoxy radicals, CH2C10z and CH2F02, and the kinetics of their respective self reactions have been studied in the gas phase using a flash photolysis technique. The absorption spectra for both radicals were quantified over the wavelength range 210 and 290 nm. The measured absorption cross-sections
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The ultraviolet absorption spectrum of the chloroethylperoxy radical, CH2ClCH202, and the kinetics of its self-reaction have been studied in the gas phase using a flash photolysis technique. The room temperature absorption cross section at 250 nm was determined to be bc~~ac~,o~ ( 250nm) = ( 3.64 5 0
Alkyl and alkylperoxy radicals originating from dimethyl ether have been studied in the gas phase at 296 K. A pulse radiolysis-UV absorption technique was used. Absorption cross-sections were quantified over the wavelength range 220-350 nm. At 230 nm, O'cH3oclJ2 = (4.2 + 0.5)Γ 10 -18 cm 2 molecule-l
Fourier transform infrared spectroscopy was used to identify CH2FOOH and HC(O)F as products of the gas-phase reaction of CHIFOz radicals with HOs radicals. At 700 Torr and 295 + 2 K, branching ratios for the CHrFOOH forming channel, k,,/k, =0.29 f 0.08 and the HC(O)F channel, klb/kl =0.71 f 0.11 wer
The UV absorption spectra of the bromomethyl (CH2Br) and bromomethylperoxy (CH2BrO 2) radicals have been determined using the flash photolysis technique. CH 2 Br exhibits the typical absorption band of halomethyl radicals, peaking near 230 nm, and CH2BrO 2 exhibits the typical broad absorption of pe
The ultraviolet-absorption spectrum and the self-reaction of CHF202 radicals have been studied in the gas phase at 298 K using the pulse radiolysis technique and long-pathlength Fourier transform infrared spectroscopy. Absorption cross sections were quantified over the wavelength range 220-280 nm. T