G. Fantechi et al., MECHANISTIC STUDIES OF THE ATMOSPHERIC OXIDATION OF METHYL BUTENOL BYOH RADICALS, OZONE AND NO3 RADICALS, Atmospheric environment, 32(20), 1998, pp. 3547-3556
In a recent field study, strong indications have been obtained that 2-
methyl-3-buten-2-ol (methyl butenol, MBO) is a compound emitted in imp
ortant quantities by some types of vegetation. The atmospheric oxidati
on products from MBO are not yet well known. In this investigation we
studied the reaction mechanisms and products of the reaction of MBO wi
th OH radicals, O-3 and NO3 radicals. All the experiments were perform
ed in a 480 l Teflon coated Pyrex glass chamber equipped with a long p
ath length FTIR spectrometer. As products from the reaction between MB
O and OH we identified and quantified acetone, glycolaldehyde, formald
ehyde, formic acid, CO and CO2. From the reaction between MBO and O-3,
the products acetone, formaldehyde, formic acid, CO and CO2 have been
identified; also, 2-hydroxy-2-methyl-propanal (HMPR) is tentatively p
ut forward as a product on the basis of HPLC and CC-MS analysis of the
DNPH derivative. Organic nitrates, peroxynitrates and carbonyl nitrat
es, together with acetone were observed as products of the reaction be
tween MBO and the nitrate radical. Tentative reaction mechanisms for t
he oxidation of MBO by OH radicals, O-3 and NO3 radicals are proposed.
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