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Title: Low-Pressure Study of the Reactions of Br Atoms with Alkenes. 3. Reactions with 2-Methyl-2-Butene, 2,3-Dimethyl-2-Butene, and 1-Hexene
Journal: J. Phys. Chem. A
Volume: 104
Page(s): 577 - 583
Year: 2000
Reference type: Journal article
Squib: 2000BED/POU577-583
Reaction:
(CH3)2C=CHCH3 + Br· → Adduct
Reaction order:
2
Temperature:
233 - 298
K
Pressure: 1.33E-3 bar
Rate expression:
5.2x10-16 [±2.5x10-16 cm3/molecule s] e15881 [±2079 J/mole]/RT
Bath gas:
He
Category: Experiment
Data type:
Absolute value measured directly
Experimental procedure:
Flow tube - Data taken vs distance
Excitation technique:
Electron beam
Time resolution:
In real time
Analytical technique:
Mass spectrometry
Comments:
The reaction was studied at 0.5 Torr, 1 Torr, and 2 Torr.Authors assumed the reaction to be pressure dependent.The data obtained at 0.5 Torr and 2 Torr were multiplied and divided by a factor of 2, respectively, to be combined with the data obtained at 1 Torr in order to derive the Arrhenius dependence.Reported uncertainties are one standard deviation for the preexponential factor and two standard deviations for the activation energy.
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Rate constant values calculated from the Arrhenius expression:
| T (K) | k(T) [cm3/molecule s] |
|---|---|
| 233 | 1.89E-12 |
| 250 | 1.08E-12 |
| 275 | 5.40E-13 |
| 298 | 3.16E-13 |