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The reactions of isoprene, MBO (2-methyl-3-buten-2-ol) and toluene with chlorine atoms have been studied as 298 ± 5 K and 740 ± 5 Torr with the use of Fourier transform infrared (FTIR) spectroscopy. Major products of the isoprene-Cl reaction and of the MBO-Cl reaction have been identified and quantified, the reaction mechanisms have been tentatively proposed in order to explain the products formed. The reaction between isoprene and Cl atoms yields mainly HCl, formyl chloride, formic acid, methylglyoxal (pyruvic aldehyde), CO and CO(2), while the MBO-Cl reaction forms acetone, HCl, formyl chloride, formic acid, CO, CO(2). As products from the reaction between toluene and Cl we identified and quantified HCl and benzaldehyde.

The rate constants for the reactions of isoprene and toluene with Cl atoms have also been determined using a relative rate method. The measured values are: k(isoprene) = (5.5 ± 1.0) E-10 cm{3}/molecule/s and k(toluene) = (5.6 ± 1.3) E-11 cm{3}/molecule/s. Atmospheric lifetimes have been estimated from these values. .

Additional information

Authors: FANTECHI G, JRC Ispra (IT);JENSEN N R, JRC Ispra (IT);SAASTAD O, JRC Ispra (IT);HJORTH J, JRC Ispra (IT);PEETERS J, Universiteit Leuven, Department of Chemistry, Heverlee (BE)
Bibliographic Reference: Article: Journal of Atmospheric Chemistry (1998)
Record Number: 199810520 / Last updated on: 1998-05-05
Original language: en
Available languages: en
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