title: Experimental and Modeling Study of the Temperature and Pressure Dependence of the Reaction C2H5 + O2 (+ M) → C2H5O2 (+ M).
abstract: The reaction C2H5 + O2 (+ M) → C2H5O2 (+ M) was studied at 298 K at pressures of the bath gas M = Ar between 100 and 1000 bar. The transition from the falloff curve of an energy transfer mechanism to a high pressure range with contributions from the radical complex mechanism was observed. Further experiments were done between 188 and 298 K in the bath gas M = He at pressures in the range 0.7-2.0 Torr. The available data are analyzed in terms of unimolecular rate theory. An improved analytical representation of the temperature and pressure dependence of the rate constant is given for conditions where the chemical activation process C2H5 + O2 (+ M) → C2H4 + HO2 (+ M) is only of minor importance.
authors.affiliation: †Physikalische-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany.
authors.forename: Ravi X
authors.initials: RX
authors.lastname: Fernandes
authors.affiliation: ‡Institut für Physikalische Chemie, Universität Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany.
authors.forename: Klaus
authors.initials: K
authors.lastname: Luther
authors.affiliation: §Laser-Laboratorium Göttingen, Hans-Adolf-Krebs-Weg 1, D-37077 Göttingen, Germany.
authors.forename: Gerd
authors.initials: G
authors.lastname: Marowsky
authors.affiliation: ∥Department of Physics, University of Helsinki, P.O. Box 64, FI 00014 Helsinki, Finland.
authors.forename: Matti P
authors.initials: MP
authors.lastname: Rissanen
authors.affiliation: ⊥Department of Chemistry, University of Helsinki, P.O. Box 55, FI 00014 Helsinki, Finland.
authors.forename: Raimo
authors.initials: R
authors.lastname: Timonen
authors.affiliation: ‡Institut für Physikalische Chemie, Universität Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany.|§Laser-Laboratorium Göttingen, Hans-Adolf-Krebs-Weg 1, D-37077 Göttingen, Germany.|#Max-Planck-Institut für Biophysikalische Chemie, Am Fassberg 11, D-37077 Göttingen, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Troe
mesh_terms: D005740:Gases / Q000737:chemistry; D006838:Hydrocarbons / Q000737:chemistry*; D008956:Models, Chemical; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D011312:Pressure; D013696:Temperature
chemical_list: D005740:Gases; D006838:Hydrocarbons; D010100:Oxygen