Products of the radical reactions arising from t-BuZOz, CFsI, and CHsI at 146Β°C in the vapor phase have been measured over a 33-fold range of CHsI/CH,I ratios and shown to be governed by the rapidly established equilibrium Together with K estimated by thermochemical methods, the results yield, for
Rate constants for alkyl radical recombination. II. The isopropyl radical
β Scribed by R. Hiatt; S. W. Benson
- Publisher
- John Wiley and Sons
- Year
- 1972
- Tongue
- English
- Weight
- 280 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0538-8066
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β¦ Synopsis
Products of radical combination from the free-radical buffer system R' + R'I RI + R'. have been analyzed for the two cases, R = Me, R' = iPr and R = Et, R' = iPr.
Results are consistent with the previously examined system where R = Me, R' = Et, and give a value of k p for iPr' combination of 108.6*1.' M-1 sec-l.
π SIMILAR VOLUMES
The high-pressure rate constant of the CF, + CF, + C,F, reaction at T = 296 K was rneasured i n the pulse photolysis ( A = 694 3 nm ruby laser) of CF, NO in the presence of NO by means of the time-resolved detection of CF,NO by the intracavity absorption of He-Ne laser radiation ( A = 632 8 nrn) The
Relative rate constants for the reactions of hydroxyl radicals with a series of alkyl substituted olefins were measured by competitive reactions between pairs of olefins a t 298 r 2 K and 1 atmospheric pressure. Hydroxyl radicals were produced by the photolysis of H,O, with 254-nm irradiation. The o
An electron paramagnetic resonance (EPR) technique was used to show that simple alkyl radicals readily abstract hydrogen from l,4-cyclohexadiene. Rate constants for the reaction were ca. 104-105 M-' s-' at 300 K and activation energies 5-7 kcal mol-'. For the stabilized radicals, ally1 and benzyl, t
## Abstract The recombination reactions of prototypical alkyl radicals (R) with O~2~, R + O~2~ β RO~2~, have been investigated theoretically by using the variational transition state theory and RiceβRamspergerβKasselβMarcus theory/master equation calculations based on the CASPT2(7,5)/augβccβpVDZ//B