Pressure dependence of the reaction C2H5+O2

E. W. Kaiser, T. J. Wallington, J. M. Andino

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56 Scopus citations


The rate constant of the reaction C2H5+O2→products, k1, has been measured as a function of pressure (3-1500 Torr) relative to that of C2H5+Cl2→C2H5Cl+Cl, k2 at 298 K in three diluents (N2, He, or SF6). Ethyl radicals were generated by UV irradiation of Cl2, C2H6, O2, N2 (He, SF6) mixtures. Using the literature value k1=2.9×10-12 cm3/molecule s at 5 Torr to calibrate the relative rate study, the rate constants at the high and low pressure (He diluent) limits for C2H5+O2+M=C2H5O2+M, k1a, are (k1a)=9.2(±0.9)×10-12 cm3/molecule s and (k1a)0=6.5(±2.0)×10-29 cm6/molecule2 s.

Original languageEnglish (US)
Pages (from-to)309-313
Number of pages5
JournalChemical Physics Letters
Issue number3-4
StatePublished - May 4 1990
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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