Kinetics of HCCl + NO x reactions

The kinetics of reactions of HCCl with NO and NO 2 were investigated over the temperature ranges 298–572 k and 298–476 k, respectively, using laser‐induced fluorescence spectroscopy to measure total rate constants and time‐resolved infrared diode laser absorption spectroscopy to probe reaction products. Both reactions are fast, with k (HCCl + NO) = (2.75 ± 0.2) × 10 −11 cm 3 molecule −1 s −1 and k (HCCl + NO 2 ) = (1.10 ± 0.2) × 10 −10 cm 3 molecule −1 s −1 at 296 K. Both rate constants displayed only a slight temperature dependence. Detection of products in the HCCl + NO reaction at 296 K indicates that HCNO + Cl is the major product with a branching ratio of ϕ = 0.68 ± 0.06, and NCO + HCl is a minor channel with ϕ = 0.24 ± 0.04. © 2001 John Wiley & Sons, Inc. Int J Chem Kinet 34: 12–17, 2002