Kinetics and mechanisms of the reaction of CH with H2O

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Abstract

The rate constant for the CH + H2O reaction has been measured in a fast-flow reactor to be (0.9 ± 0.4) × 10-11 cm3 molecule-1 s-1 at 330 K. The product branching ratio of H atoms probed by resonance fluorescence is determined to be 100%. Quantum chemistry and statistical calculations show that the rate limiting process is the isomerisation of the HCOH2 adduct to H2COH and allow us to propose k = (2.8 ± 1.4) × 10-11(T/300)-1.22 ± 0.07exp(-(12 ± 12)/T) cm3 molecule-1 s-1 in the range 100-700 K for the rate constant of CH + H2O → H + H2CO and H2 + H + CO. © 2009 Elsevier B.V. All rights reserved.

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Bergeat, A., Moisan, S., Méreau, R., & Loison, J. C. (2009). Kinetics and mechanisms of the reaction of CH with H2O. Chemical Physics Letters, 480(1–3), 21–25. https://doi.org/10.1016/j.cplett.2009.07.080

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