Gas-phase reaction of the Cl atoms with dimethylbenzaldehyde isomers

Abstract : Rate coefficients for the gas-phase reactions of Cl atoms with three isomers of dimethylbenzaldehyde (DMBs) have been determined using the relative rate method. Relative rate measurements were performed in a Teflon reaction chamber at 298 ± 3 K and atmospheric pressure. The rate constants obtained (10−11 cm3 molecule−1 s−1) were, respectively, 8.8 ± 1.7, 9.5 ± 1.4 and 9.6 ± 1.6 for 2,4-DMB, 2,5-DMB and 3,5-DMB. This work provides the first kinetic determination of the gas-phase reactions of Cl atoms with DMBs. Our results are compared with the OH reaction with the same DMBs and discussed in terms of structure-reactivity relationship and the atmospheric impact of DMBs.
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https://hal.archives-ouvertes.fr/hal-00671960
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Submitted on : Monday, February 20, 2012 - 10:07:51 AM
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Gisèle El Dib, Abdelkhaleq Chakir, Véronique Daële, Abdelwahid Mellouki. Gas-phase reaction of the Cl atoms with dimethylbenzaldehyde isomers. Chemical Physics Letters, Elsevier, 2008, 455 (4-6), pp.151-155. ⟨10.1016/J.CPLETT.2008.02.068⟩. ⟨hal-00671960⟩

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