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Author(s):   Dillon, T.J.; Pozzer, A.; Vereecken, L.; Crowley, J.N.; Lelieveld, J.
Title:   Does acetone react with HO2 in the upper-troposphere?
Journal:   Atmos. Chem. Phys.
Volume:   12
Page(s):   1339 - 1351
Year:   2012
Book Title:   ''
Editor:   ''
Publisher:   ''
Publisher address:   ''
Comments:   ''
Reference type:   Journal article
Squib:   2012DIL/POZ1339-1351

Reaction:   (CH3)2CO + HO2 → (CH3)2C(OH)OO
Reaction order:   2
Temperature:   207 K
Pressure:  3.33E-2 bar
Rate expression:   2.0x10-12 [cm3/molecule s]
Rate constant is a lower limit.
Category:  Experiment
Data type:   Absolute value measured directly
Pressure dependence:   None reported
Experimental procedure:   Static or low flow - Data taken vs time
Excitation technique:   Flash photolysis (laser or conventional)
Time resolution:   In real time
Analytical technique:   Laser induced fluorescence
Comments:   Reaction with NO converted HO2 to OH for detection by laser induced fluorescence. Reduced yields of OH at T < 220K provided indirect evidence for the sequestration of HO2 by acetone. No evidence for this reaction was observed at T > 230 K, probably due to rapid thermal dissociation.

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