A mixture of Brz + HBr + CzFsI was photolyzed in the vapor phase. The reaction Br + CzFsI -IBr + CzF5 forms CzFb radicals which are removed by (9) CzFs + Brz -CzFbBr + Br kg (10) CzFs + HBr -CzFsH + Br klo Competitive studies over the range of 74-146'C gave ratios of h l ~/ h s , and these were comb
The kinetics of the reactions of i-C3F7 radicals with BR2 and HBr
โ Scribed by Ian Weeks; Eric Whittle
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 256 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0538-8066
No coin nor oath required. For personal study only.
โฆ Synopsis
The reactions (2)
(3) have been studied competitively in the vapor phase over the range of 52-204ยฐC. The i-C3F7 radicals were generated by means of the reaction
It was found that log kz/k3 = (0.55 f 0.07) + (10,870 f 560)/0 where 0 = 2.303RT J/mol. Absolute Arrhenius parameters are derived for the reactions R + HBr + RH + Br where R = CF3, CzFs, and i-C3F7.
๐ SIMILAR VOLUMES
Studies of the reaction of Br + propylene to produce HBr and ally1 radical were made using VLPR (Very Low Pressure Reactor) over the range 263-363 K. Apparent bimolecular rate constants k;PP were found to vary in an inverse manner with the initial concentration of bromine atoms introduced into the r
Absolute rate constants a t room temperature for the metathesis reaction C~FS + Br2 C2FSBr + Br and nd3F7 + Br2 CzFTBr + Br have been measured under V L P P conditions: The radicals were generated through collisionless infrared-multiphoton decomposition of the corresponding iodides by irradiation f
The kinetics of the title reactions have been studied using the discharge-flow mass spectrometic method at 296 K and 1 torr of helium. The rate constant obtained for the forward reaction (1), using three different experimental approaches (kinetics of Br Br ฯฉ IBr : I ฯฉ Br 2 consumption in excess of
The rate constants for the reaction of with HBr and DBr have been measured with the cavityring-down method in the temperature range of 297 to 523 K and 297 to 500 K, respectively. These rate constants can be effectively represented, in units of cm3/s, by exp[(-554 2 208)/T] and kHLlr = 10-10.40?0.24
Reactions of CFSBr with H atoms and OH radicals have been studied a t room temperature a t 1-2 torr pressures in a discharge flow reactor coupled to an EPR spectrometer. The rate constant of the reaction H + CF3Br -CF3 + HBr (1) was found to be k l = (3.27 f 0.34) X cm:'/moleesec was determined for