caa a22 4500 378913689 CHVBK 20180305123548.0 cr unu---uuuuu 161128e20040401xx s 000 0 eng 10.1524/zpch.218.4.493.29203 doi (NATIONALLICENCE)gruyter-10.1524/zpch.218.4.493.29203 Gas-Phase Kinetics of the Reactions of the CH2F Radicals with the Radicals CHF2, CH3, and C2H5 [Elektronische Daten] [T. Beiderhase, Karlheinz Hoyermann, Jörg Nothdurft, Matthias Olzmann] The mechanisms and the rates of the reactions of the fluorinated hydrocarbon radical CH2F with the fluorinated and pure hydrocarbon radicals CHF2, CH3, and C2H5, respectively, have been studied at low pressure (around 2 mbar) and room temperature using the discharge-flow reactor technique. Mass spectrometry either with electron impact or laser induced multiphoton ionization was applied for the detection of labile and stable species. The cross combination of the radicals is mainly followed by HF elimination from the chemically activated adduct. The overall rate coefficients at 298K for CH2F + CHF2 → C2H2F2 + HF (1) CH2F + CH3 → C2H4 + HF (2) CH2F + C2H5 → C3H6 + HF (3) were derived from the analysis of the radical-time profiles by fit procedures; the following values were obtained: CH2F + CHF2 → C2H2F2 + HF (1) CH2F + CH3 → C2H4 + HF (2) CH2F + C2H5 → C3H6 + HF (3) k1 = (3.0 + 1.5/ − 0.7) × 1012cm3mol−1s−1 k2 = (4.0 ± 1.5) × 1013cm3mol−1s−1 k3 = (9.0 ± 3) × 1012cm3mol−1s−1. The results are discussed in terms of chemical activation mechanisms. © 2004 Oldenbourg Wissenschaftsverlag GmbH Thermodynamics & statistical physics nationallicence Laboratory techniques, experiments nationallicence Physical chemistry nationallicence Beiderhase T. aut Hoyermann Karlheinz aut Nothdurft Jörg aut Olzmann Matthias aut Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 218/4/2004(2004-04-01), 493-510 0942-9352 218:4/2004<493 2004 218 zpch https://doi.org/10.1524/zpch.218.4.493.29203 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/zpch.218.4.493.29203 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Beiderhase T. aut NATIONALLICENCE 700 1- Hoyermann Karlheinz aut NATIONALLICENCE 700 1- Nothdurft Jörg aut NATIONALLICENCE 700 1- Olzmann Matthias aut NATIONALLICENCE 773 0- Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 218/4/2004(2004-04-01), 493-510 0942-9352 218:4/2004<493 2004 218 zpch CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence SWISSBIB 378595741 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter