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Chemical Sciences Division
Orlando, J.J.; Tyndall, G.S.; Apel, E.C.; Riemer, D.D.; Paulson, S.E.|
Rate Coefficients and Mechanisms of the Reaction of Cl-Atoms with a Series of Unsaturated Hydrocarbons Under Atmospheric Conditions
334 - 353
CH2=C(CH3)CH=CH2 + ·Cl → Products
C3H8 + ·Cl → Products
Reference reaction order:
Pressure: 1.01 bar
Relative rate value measured
Static or low flow - Data taken vs time
Flash photolysis (laser or conventional)
By end product analysis
Fourier transform (FTIR)
The authors have used the relative rate technique to study the reaction of Cl atoms with a number of unsaturated species, including isoprene, methacrolein (MACR), methyl vinyl ketone (MVK), 1,3-butadiene, trans-2-butene, and 1-butene. Reactions were carried out at room temperature in synthetic air and/or nitrogen. Numerous products in the Cl atom initiated oxidation were identified and mechanistic discussion is provided.
Absolute rate coefficients were derived in conjunction with recommended values for the reaction of Cl with propane, k = 1.43 ?10-10 cm3 molecule-1 s-1 (independent of pressure), propene, k = 2.63 ?10-10 cm3 molecule-1 s-1 (at 700 Torr total pressure), and/or ethene, k = 0.99 ?10-10 cm3 molecule-1 s-1 (at 700 Torr total pressure).
Uncertainties are 1 standard deviation and are precision only.
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