The kinetics and equilibrium of the gas-phase reaction of CHaCFZBr with IZ were studied spectrophotometrically from 581 to 662°K and determined to be consistent with the following mechanism: KIZ
The kinetics of the thermal bromination of CF3I. Determination of the bond dissociation energy D(CF3−I)
✍ Scribed by Ernest N. Okafo; Eric Whittle
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- English
- Weight
- 538 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0538-8066
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✦ Synopsis
Abstract
The kinetics of the thermal bromination reaction
have been studied in the range of 173–321°C. For the step
equation image
we obtain
where θ=2.303__RT__ cal/mole. From the activation energy for reaction (11), we calculate that
This is compared with previously published values of D(CF~3~−I). The relevance of the result to published work on k~c~ for a combination of CF~3~ radicals is discussed.
📜 SIMILAR VOLUMES
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The kinetics of the reaction of CF,CFHO, radicals with NO was studied by flash photolysis-time-resolved mass spectrometry. From the kinetic growth rate of NO: molecular ions the rate coefficient of the reaction CF,CFHO, + NO -+ CF,CFHO + NO, was determined to be k = (1.31 &-0.30) X 10-l' cm3 molecul
The anisotropic ESR spectra of the CFsX-radical anions (X = Cl, Br, I) have been observed following 7 irradiation at 77 K of solid solutions containing up to 5 mole % of the CF3X parent compound in tetramethylsilane (TMS), neopentane, and 2-methyltetrahydrofuran. The resolution of the line component
The reactions C1 + RI+ICl + R (R = CF,, CzF5, and i-C,F,) have been studied competitively in the gas phase over the range of 27-231°C. The following Arrhenius parameters were obtained: log A(cm3/mol . s) 13.99 f 0.21 13.97 -+ 0.20 14.18 f 0.20 E(kJ/mol) 17.1 2 2.0 11.5 f 2.0 10.2 2 2.0 The above da