Pulse radiolysis was used to study the kinetics of the reactions of CH 3 C(O)CH 2 O 2 radicals with NO and NO 2 at By monitoring the rate of formation and decay of NO 2 295 K. using its absorption at the rate constants 400 and 450 nm k(CH C(O)CH O ϩ NO) ϭ (8 Ϯ 3 2 2 and were de-Ϫ12 Ϫ12 3 Ϫ1 Ϫ1 2) ϫ
Atmospheric chemistry of FCOx radicals: Kinetic and mechanistic study of the FC(O)O2 + NO2 reaction
✍ Scribed by Timothy J. Wallington; William F. Schneider; Trine E. Møgelberg; Ole J. Nielsen; Jens Sehested
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 688 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0538-8066
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✦ Synopsis
A pulse radiolysis system was used to study the kinetics of the reaction of FC(0)Oz radicals with NOz. By monitoring the rate of the decay of NO2 using its absorption at 400 nm the reaction rate constant was determined to be (5.5 ? 0.6) X 10-l' cm3 molecule-' 5-l a t 296 K and 500-1000 mbar pressure of SF6 diluent. A long path length Fourier transform infrared spectrometer was used to investigate the thermal stability of the product FC(0)OzNOz. The rate of thermal decomposition of FC(0)02N02 was independent of the total pressure of Nz diluent over the range 100-700 torr and was fit by the expression k-3 = 6.0 x exp(-14150/T) s-l. The results are discussed in the context of the atmospheric chemistry of FCO, radicals.
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A laser flash photolysis-resonance fluorescence technique has been employed to investigate the kinetics and mechanism of the reaction of electronically excited oxygen atoms, O( 1 D), with CF 2 HBr. Absolute rate coefficients (k 1 ) for the deactivation of O( 1 D) by CF 2 HBr have been measured as a
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