The Rate Constant for the Recombination Reaction Between CF3 and O2 Measured Between 2 and 110 Torr
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C. Breheny
The rate constant k1 for the recombination reaction between CF3 radicals and O2 has been measured at 295K over the pressure range of 2-110 Torr, predominately in N2. CF3 radicals were formed by the uv photolysis of CF3I, and their kinetic decay monitored in the presence of NO2 and O2 by observing the infrared emission from the products of the CF3 + NO2 reaction. The data were combined with higher pressure relative rate constant measurements in the literature to yield a fall off curve with the high pressure limiting value of k1(∞)=(2.55±0.11)·10-12cm3molecule-1s-1 and the low pressure third body recombination rate constant k1(0)=(2.5±0.3)·10-29cm6molecule-2s-1 with 2σ quoted errors, and the Troe broadening parameter Fc=0.60. The high pressure limiting value is some 35% lower than the currently recommended value, but is believed to be more reliable because of the far shorter extrapolation to the high pressure limit in the present study compared with previous work. Our data also suggest a reevaluation of the bimolecular rate constant of the CF3+Cl2 reaction to (2.3±0.6)·10-14cm3molecule-1s-1.
Artikel in diesem Heft
- Detailed Kinetic Investigation of the C2H5+Cl2 Reaction and Analysis of the Reaction of CH3+Cl2 Initiated by H-Atom Contamination at 298K and at Millitorr Pressures
- The Rate Constant for the Recombination Reaction Between CF3 and O2 Measured Between 2 and 110 Torr
- Spectrally Resolved Phosphorescence and Slow Fluorescence from Selected Vibronic Levels of Jet-Cooled Glyoxal
- Delayed Excimer Fluorescence of Fluoranthene Due to Triplet-Triplet Annihilation: Systematic Study of the Fluorescence from a Weakly Bound Excimer
- Ab Initio Studies of Complexes of HO2 Radicals with NH3, H2O, and HF
- Linear Triplet SiC3 and SiC5: Results of Coupled Cluster Calculations
- Splitting of the Zero Phonon Lines of Indole, 3-Methyl Indole, Tryptamine and N-Acetyl Tryptophan Amide in Helium Droplets
- Nonequilibrium Excitation of C2 Radicals during the Thermal Decomposition of C3 O2 behind Shock Waves
- Book Reviews
Artikel in diesem Heft
- Detailed Kinetic Investigation of the C2H5+Cl2 Reaction and Analysis of the Reaction of CH3+Cl2 Initiated by H-Atom Contamination at 298K and at Millitorr Pressures
- The Rate Constant for the Recombination Reaction Between CF3 and O2 Measured Between 2 and 110 Torr
- Spectrally Resolved Phosphorescence and Slow Fluorescence from Selected Vibronic Levels of Jet-Cooled Glyoxal
- Delayed Excimer Fluorescence of Fluoranthene Due to Triplet-Triplet Annihilation: Systematic Study of the Fluorescence from a Weakly Bound Excimer
- Ab Initio Studies of Complexes of HO2 Radicals with NH3, H2O, and HF
- Linear Triplet SiC3 and SiC5: Results of Coupled Cluster Calculations
- Splitting of the Zero Phonon Lines of Indole, 3-Methyl Indole, Tryptamine and N-Acetyl Tryptophan Amide in Helium Droplets
- Nonequilibrium Excitation of C2 Radicals during the Thermal Decomposition of C3 O2 behind Shock Waves
- Book Reviews
