✦ LIBER ✦

FTIR study of the Cl-atom initiated oxidation of methylglyoxal

✍ Scribed by M. Green; G. Yarwood; H. Niki

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 533 KB
Volume: 22
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550220705

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✦ Synopsis

Abstract

The kinetics and mechanism of Cl‐atom initiated reactions of CH~3~C(O)CHO were studied using the FTIR detection method in the photolysis (λ < 300 nm) of Cl~2~CH~3~C(O)CHO mixtures in 700 torr of N~2~O~2~ diluent at 298 ± 2 K. The observed product distribution over the O~2~ pressure range from 0–700 torr, combined with relative rate measurements, provided evidence that: (1) the primary step is Cl + CH~3~C(O)CHO → HCl + CH~3~C(O)CO with a rate constant of (4.8 ± 1.1) × 10^−11^ cm^3^ molecule^−1^ s^−1^; and (2) the predominant fate of the primary radical CH~3~C(O)CO under atmospheric conditions is unimolecular dissociation to CH~3~C(O) radicals and CO, rather than O~2~‐addition to yield the corresponding carbonylperoxy radical CH~3~C(O)C(O)OO.

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