Kinetics of the addition reaction of methyl radicals with nitric oxide studied by pulse radiolysis combined with infrared diode laser spectroscopy

J.T. Jodkowski, E. Ratajczak, A. Sillesen, P. Pagsberg

    Research output: Contribution to journalJournal articleResearch

    Abstract

    The reaction CH3 + NO (+ M) --> CH3NO ( + M) was initiated by pulse radiolysis of acetone/nitric oxide mixtures and the kinetics of methyl radicals was studied by time-resolved infrared absorption spectroscopy. The rate constant was found to be strongly pressure dependent in the range of p (M) = 6.5-150 mbar at 298 K with M = acetone as the third body. The experimental results are represented in terms of a fall-off curve centered at 37 mbar with limiting high- and low-pressure rate constants of k(rec,infinity) = (6.6 +/- 0.9) x 10(9) x (T/300)0.6 M-1 s-1 and k(rec,0)/[M] = (4.4 +/- 0.4) x 10(12) x (T/300)-3.5 M-2 s-1, respectively.
    Original languageEnglish
    JournalChemical Physics Letters
    Volume203
    Issue number5-6
    Pages (from-to)490-496
    ISSN0009-2614
    DOIs
    Publication statusPublished - 1993

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