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Author(s):   Clifford, G.M.; Thuner, L.R.; Wenger, J.C.; Shallcross, D.E.
Title:   Kinetics of the gas-phase reactions of OH and NO3 radicals with aromatic aldehydes
Journal:   J. Photochem. Photobiol. A Chem.
Volume:   176
Page(s):   172 - 182
Year:   2005
Reference type:   Journal article
Squib:   2005CLI/THU172-182

Reaction:   3-Methylbenzaldehyde + ·OH → Products
Reaction order:   2
Temperature:   295 K
Pressure:  1.01 bar
Rate expression:   2.07x10-11 [±2.4x10-12 cm3/molecule s]
Category:  Experiment
Data type:   Relative rate value measured
Pressure dependence:   Rate constant is pressure independent
Experimental procedure:   Static or low flow - Data taken vs time
Excitation technique:   Direct photolysis
Time resolution:   By end product analysis
Analytical technique:   Gas chromatography
Comments:   Hydroxyl radicals produced by the photolysis of methyl nitrate in the presence of NO and O2.
Benzaldehyde, n-hexand, diethyl ether, 1,2,4-trimethylbenzene, and n-butyl ether all used as reference compounds.

Reactivity of aromatic aldehydes toward OH follows a linear free energy relationship typical of addition reactions, although the overall reaction is H-abstraction.

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