The CH2CHO + O channel of the reaction of vinyl radical with O2

Tatsuo Oguchi*, Yoshihisa Sato, Hiroyuki Matsui

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The reaction kinetics of C2H3 + O2 has been studied at room temperature, where, CH2CHO produced in this reaction is monitored quantitatively by using a laser induced fluorescence technique. The reaction rate constant is obtained as (8.5 ± 1.0) × 10-12 cm3 molecule-1 s-1 with almost no pressure dependence for the range of 10-100 Torr (He): the present result is consistent with the previous experimental studies. Also by using two different precursors as a source of C2H3, the branching fraction of producing CH2CHO + O channel is determined as φ{symbol}(CH2CHO) = 0.14-0.21, i.e., O-O bond scission in the reaction intermediate, vinylperoxy radical, is confirmed, exhibiting clear contrast to alkylperoxy radicals.

Original languageEnglish
Pages (from-to)181-184
Number of pages4
JournalChemical Physics Letters
Issue number4-6
StatePublished - 20 Apr 2009

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