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A flash photolysis investigation of the gas phase uv absorption spectrum and self-reaction kinetics of the neopentylperoxy radical

✍ Scribed by Philippe Dagaut; Michael J. Kurylo

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 574 KB
Volume: 22
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550221107

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✦ Synopsis

The ultraviolet absorption spectrum of the neopentylperoxy radical, (CH3)3CCH202 (or C5HI1O2), 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 0 ~~~, , 0 ~( 2 5 0 nm) = (5.18 ? 0.78) x lo-" cm2 molecule-' and was used to normalize the radical absorption spectrum between 210 and 300 nm. Detailed modeling of the self-reaction system was used to interpret the transient absorption kinetic decay curves over the temperature range 228-380 K, at total pressures between 25 and 100 torr. The results are discussed in relation to previous measurements of alkylperoxy radical spectra and kinetics.

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