Temperature Dependence of the Rate Constant for the Reaction F(2P) + Cl2 → FCl + Cl at T = 180−360 K

• Published in: The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2004-03, Vol.108 (10), p.1726-1730
• Main Authors: Nesbitt, Fred L, Cody, Regina J, Dalton, Douglas A, Riffault, Veronique, Bedjanian, Yuri, Le Bras, Georges
• Format: Article
• Language: English
• ISSN: 1089-5639; 1520-5215
• DOI: 10.1021/jp030469r

The absolute rate constant for the reaction F(2P) with Cl2 has been measured using the discharge flow kinetics technique coupled to mass spectrometric detection at T = 180−360 K and 1 Torr He nominal pressure. Experiments were performed at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD, and Laboratoire de Combustion et Systemes Reactifs-CNRS in Orleans, France. Results of k = (5.7 ± 0.8) × 10-11 and (6.2 ± 0.8) × 10-11 cm3 molecule-1 s-1 independent of temperature were obtained by each laboratory, respectively. When the results from both laboratories were combined into one data set, an average temperature independent value of k 1 = (6.0 ± 1.1) × 10-11 cm3 molecule-1 s-1 was obtained. A very slight positive temperature dependence with k 1(T) = (6.5 ± 1.5) × 10-11 exp{−(20 ± 60)/T} cm3 molecule-1 s-1 may also be derived from the combined data in the range T = 180−360 K.