ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The rate coefficients for the reactions of OH with ethane (k1), propane (k2), n-butane (k3), iso-butane (k4), and n-pentane (k5) have been measured over the temperature range 212-380 K using the pulsed photolysis-laser induced fluorescence (PP-LIF) technique. The 298 K values are (2.43±0.20) × 10-13, (1.11 ± 0.08) × 10-12, (2.46 ± 0.15) × 10-12, (2.06 ± 0.14) × 10-12, and (4.10 ± 0.26) × 10-12 cm3 molecule-1 s-1 for k1, k2, k3, k4, and k5, respectively. The temperature dependence of k1 and k2 can be expressed in the Arrhenius form: k1 = (1.03 ± 0.07) × 10-11 exp[-(1110 ± 40)/T] and k2 = (1.01 ± 0.08) × 10-11 exp[-(660 ± 50)/T]. The Arrhenius plots for k3 - k5 were clearly curved and they were fit to three parameter expressions: k3 = (2.04 ± 0.05) × 10-17 T2 exp[(85 ± 10)/T] k4 = (9.32 ± 0.26) × 10-18 T2 exp[(275 ± 20)/T]; and k5 = (3.13 ± 0.25) × 10-17 T2 exp[(115 ± 30)/T]. The units of all rate constants are cm3 molecule-1 s-1 and the quoted uncertainties are at the 95% confidence level and include estimated systematic errors. The present measurements are in excellent agreement with previous studies and the best values for atmospheric calculations are recommended. © 1994 John Wiley & Sons, Inc.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550261003
