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A flash photolysis investigation of the UV absorption spectrum and self-reaction kinetics of CH2ClCH2O2 radicals in the gas phase

✍ Scribed by Philippe Dagaut; Timothy J. Wallington; Michael J. Kurylo

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 578 KB
Volume: 146
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(88)87507-9

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✦ Synopsis

The ultraviolet absorption spectrum of the chloroethylperoxy radical, CH2ClCH202, and the kinetics of its self-reaction have been studied in the gas phase using a flash photolysis technique. The room temperature absorption cross section at 250 nm was determined to be bc~~ac~,o~ ( 250nm) = ( 3.64 5 0.39) X 10 -I* cm2 molecule-' and was used to calculate an observed self-reao tion rate constant, defined as -d[CH2ClCH202]/dt=2~~[CH2ClCH20~]z, of kb(298 K)= (3.57+0.57)X10-'2 cm3 molecule-' s-', independent of pressure over the range 25-400 Torr. Data over the temperature range 228-380 K and at a total pressure of 100 Torr were used to obtain the Arrhenius expression kObs= (l.lf0.7)~ lo-l3 exp[ (1020f 170)/T] cm3 molecule-' s-'.

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