Abstract
The rate constants for H atom reactions with Cl2 and F2 have been measured by monitoring the loss rate of hydrogen atoms in the presence of excess [Cl2] and [F2] via time-resolved, laser-induced Lyman-α fluorescence. The rate constants for H + F2 and H + Cl2 were found to be 2.4 ± 0.4 (2σ) × 10-12 and 2.52 ± 0.18 (2σ) × 10-11 cm3 s-1, respectively. The result for H + F2 is consistent with the recommendation of Baulch et al. [J. Phys. Chem. Ref. Data 1981, 10 (Suppl. 1)], and our k(H + Cl2) value is consistent with the majority of previous measurements.
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