The gas phase photolysis of CCl, in the presence of several alkanes has been used to obtain Arrhenius parameters for the abstraction of hydrogen atoms by the cc& radical: (4) Cc1, + RH -% CRCI, + R The following log k4 values were obtained: 2,3-Dimethylbutane C -C ~H I ~ Methy lcy clohexane log k4 1
Some hydrogen abstraction reactions of the CF3CCl2 radical
β Scribed by Fred B. Wampler; Robert R. Kuntz
- Publisher
- John Wiley and Sons
- Year
- 1971
- Tongue
- English
- Weight
- 284 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0538-8066
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β¦ Synopsis
The gas phase photolysis of CP3CC13 in the presence of scveral alkanes has been used to obtain Arrhenius parameters for the abstraction of hydrogen atoms by the CF3CC12 radical : CFBCCI~ + RH -+ CF3CC12H + R Activation energies of 9.6 and 8.0 kcal/mole are found for abstraction from secondary and tertiary C-H bonds, respectively. The Arrhenius parameters are compared to those for CC13 and CFI radicals.
π SIMILAR VOLUMES
Rate constants have been measured in aqueous solutions for the reactions of the carbonate radical, COs'-, with several saturated alcohols and one cyclic ether as a function of temperature. Arrhenius pre-exponential factors ranged from 2 X lo8 to 1 X lo9 e mol-' s-l and activation energies ranged fr
## Abstract Rate coefficients, __k__, and ClO radical product yields, __Y__, for the gasβphase reaction of O(^1^D) with CClF~2~CCl~2~F (CFCβ113) (__k__~2~), CCl~3~CF~3~ (CFCβ113a) (__k__~3~), CClF~2~CClF~2~ (CFCβ114) (__k__~4~), and CCl~2~FCF~3~ (CFCβ114a) (__k__~5~) at 296 K are reported. Rate coe
Hydrogen abstration from H,S by CF, radicals, generated by the photolysis of both CF,COCF, and CF,I. has been studied in the temperature range 314-434 K. The rate constant, based on the value of lo', 36 cm3/mol . s for the recombination of CF, radicals, is given by log h, = (12.20 I 0.05) -(19,220 2
## Abstract By means of the dualβlevel direct dynamics method, the mechanisms of the reactions, CH~3~CF~2~Cl + OH β products (R1) and CH~3~CFCl~2~ + OH β products (R2), are studied over a wide temperature range 200β2000 K. The optimized geometries and frequencies of the stationary points are calcul