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@ARTICLE{Berasategui:889016,
author = {Berasategui, Matias and Amedro, Damien and Vereecken, Luc
and Lelieveld, Jos and Crowley, John N.},
title = {{R}eaction between ${CH}\<sub\>3\</sub\>{C}({O}){OOH}$
(peracetic acid) and {OH} in the gas phase: a combined
experimental and theoretical study of the kinetics and
mechanism},
journal = {Atmospheric chemistry and physics},
volume = {20},
number = {21},
issn = {1680-7324},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {FZJ-2020-05390},
pages = {13541 - 13555},
year = {2020},
abstract = {Peracetic acid (CH3C(O)OOH) is one of the mostabundant
organic peroxides in the atmosphere; yet the kinetics of
itsreaction with OH, believed to be the major sink, have
only been studied onceexperimentally. In this work we
combine a pulsed-laser photolysis kineticstudy of the title
reaction with theoretical calculations of the
ratecoefficient and mechanism. We demonstrate that the rate
coefficient isorders of magnitude lower than previously
determined, with an experimentallyderived upper limit of
4×10-14 cm3 molec.−1 s−1. The relatively low rate
coefficient is in good agreement withthe theoretical result
of 3×10-14 cm3 molec.−1 s−1 at 298 K,
increasing to ∼6×10-14 cm3 molec.−1 s−1 in the
cold uppertroposphere but with associated uncertainty of a
factor of 2. The reactionproceeds mainly via abstraction of
the peroxidic hydrogen via a relativelyweakly bonded and
short-lived prereaction complex, in which H
abstractionoccurs only slowly due to a high barrier and low
tunnelling probabilities.Our results imply that the lifetime
of CH3C(O)OOH with respect toOH-initiated degradation in the
atmosphere is of the order of 1 year (notdays as previously
believed) and that its major sink in the free and
uppertroposphere is likely to be photolysis, with deposition
important in theboundary layer.},
cin = {IEK-8},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {243 - Tropospheric trace substances and their
transformation processes (POF3-243)},
pid = {G:(DE-HGF)POF3-243},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000589246000001},
doi = {10.5194/acp-20-13541-2020},
url = {https://juser.fz-juelich.de/record/889016},
}