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Walter Hack, B. Wagner, Karlheinz Hoyermann
The Elementary Reaction of CHF(X˜1A´) with Ozone
The reaction CHF(X˜1A´) + O3 → products (1) has been studied in an isothermal flow reactor in the temperature range from 235 K to 443 K and at a pressure of about p = 2 mbar under pseudo first order conditions, [O3]0 >> [CHF]0. He was the main carrier gas. The CHF(X˜) radical was produced in the reaction sequence CH3F + F → CH2F + HF; CH2F + F → CHF(X˜) + HF and detected by laser induced fluorescence. For reaction (1) a value of the rate constant:
k1(T) = (6.1&plusm;0.6) · 1012(T/298 K)-0.6&plusm;0.4[cm3/mol s]
was obtained. No change in the rate constant was observed, substituting He by the quenchers N2 or SF6. The reaction mechanism is discussed.
Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag
Print ISSN: 0942-9352
Volume: 214, 06/2000
Pages: 741