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Flash photolysis study of the NO‐catalyzed recombination of bromine atoms

1978; Wiley; Volume: 10; Issue: 2 Linguagem: Inglês

10.1002/kin.550100203

1097-4601

H. Hippler, S. H. Luu, Heshel Teitelbaum, J. Troe,

Spectroscopy and Laser Applications

Abstract The recombination of bromine atoms at room temperature has been studied by flash photolysis in the range of 1–100 atm of the inert diluent He, leading to a value for the third‐order rate constant of (1.5 ± 0.2) × 10 15 cm 6 /mol 2 .sec. In the presence of NO the recombination is considerably accelerated. The falloff curve of the recombination Br + NO (+He) → BrNO (+He) was also measured resulting in a value for the limiting low‐pressure rate constant of (3.4 ± 1.3) × 10 15 cm 6 /mol 2 .sec. In experiments with excess NO, rate constants of (2.2 ± 1) × 10 14 cm 3 /mol·sec for the reaction Br + BrNO → Br 2 + NO, and (6.1 ± 0.4) × 10 9 cm 6 /mol 2 .sec for the reaction Br 2 + 2NO → 2BrNO were obtained.