Abstract
The kinetic data on the molecular oxygen activity of CH3CH·, CH3CF2 · and CF3CHF· radicals are reported. In laboratory, these radicals were generated by pulsed (12 ns) electron beam interaction with the gaseous RHF-O2-CO2 mixtures containing large excess of carbon dioxide (RHF = CH3CH2F, CH3CHF2 or CH2FCF3). The transient product (O3 or RFO2 ·) formation was monitored by the UV absorptions at 250 nm and the rate constants of Reactions (4) and (9) were obtained. The values of k 9 diminished with increasing number of fluorine atoms in RHF molecule. For CH3CH2F and CH3CHF2 the k 9’s were equal to (8.8–10.2)·10−14cm3 ·s−1 and (7.3–8.4)·10−14cm3 ·s−1, respectively, and seem to be determined for the first time. In the case of CH2FCF3 the obtained value of k CF3CHF+O2 = 5.20±0.76·10−14cm3 ·s−1 is much higher than the value published in the literature.4 The other determined rate constant data are comparable to the literature values.
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Jowko, A., Wnorowski, K. & Wojciechowski, K. Kinetics of the peroxy RFO2 radical formation in the RHF-O2-CO2 gaseous mixtures. J Radioanal Nucl Chem 275, 201–207 (2008). https://doi.org/10.1007/s10967-007-7007-4
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DOI: https://doi.org/10.1007/s10967-007-7007-4