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Recently field studies have identified 2-methyl-3-buten-2-ol (methyl butenol, MBO) as an important compound emitted by vegetation. The atmospheric oxidation products from MBO are not yet well known. This article discusses an investigation in which the reaction mechanisms and products of the reaction of MBO with OH radicals, O3 and NO3 radicals were studied. All of the experiments were performed in a 480 l Teflon coated Pyrex glass chamber equipped with a long path length Fourier transform-infrared (FT-IR) spectrometer. From the reaction between MBO and OH we identified acetone, glycolaldehyde, formaldehyde, formic acid, CO and CO(2). From the reaction between MBO and O(3) acetone, formaldehyde, formic acid, CO and CO(2) have been identified. 2-hydroxy-2-methyl-propanal (HMPR) has been tentatively identified as a product of the MBO-O(3) reaction on the basis of high performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS) analysis of the 2,4-dinitrophenylhydrazine (DNPH) derivative. A reaction mechanism for the oxidation of MBO by OH radicals and NO(3) radicals has been tentatively proposed. Organic nitrates, peroxynitrates and carbonyl nitrates, together with acetone were identified as products of the reaction between MBO and the nitrate radical.

Additional information

Authors: FANTECHI G, JRC Ispra (IT);JENSEN N R, JRC Ispra (IT);HJORTH J, JRC Ispra (IT);PEETERS J, Katholieke Universiteit Leuven, Department of Chemistry (BE)
Bibliographic Reference: Article: Atmospheric Environment (1997)
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