The laser flash photolysis-absorption technique has been used to study the F + FCO + M ~ CF20 + M recombination reaction between 20 and 700 Torr of M = CF 4 at 296 K. The values krec, 0 = (5.6 + 1.2) Γ 10 -29 [CF 4] cm 3 molecule-1 s-1 and krec,o~ = (7.9 + 1.1) X 10-11 cm 3 molecule-1 s-1 were deter
An examination of the reaction pathways for the recombination of FCO radicals
β Scribed by Yao Zhao; J.S. Francisco
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 402 KB
- Volume
- 199
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Pathways for the reaction of FCO+FCO on the ground state potential energy surface have been studied by using ab initio methods. Heats of reaction and barrier heights have been computed by using Moller-Plesset perturbation theory. The reaction of FCO t FCO has been found to form F2C202 molecule as an intermediate which subsequently dissociates to form F&O and CO. Since the exothermicitv for the overall reaction is much larger than the barrier for the dissociation of F2Cz02. the reaction to produce FrCO t CO should be rapid.
π SIMILAR VOLUMES
The heats of formation for CHsCO and CFsCO molecules have been determined using ab initio molecular orbital calculations from isodesmic schemes. The heat of formation for CHJCO has been calculated as -4.2 +2 kcal mol-', which is in good agreement with experiment and that for CF,CO as -139.9 f 2 kcal
## Abstract The decaying absorption of CH~3~ radicals at 216.4 nm has been followed over more than three halfβlives using a photoelectric splitβbeam kinetic spectrometer. The rate constant for recombination __k__~r~ was found to be (5.60 Β± 0.76) Γ 10^β11^ cm^3^/moleculeΒ·s.