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Rate constants for the gas-phase reactions of OH radicals with CH3CHF2 and CHC12CF3 over the temperature range 295-388 K

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Rate constants for the reactions of OH radicals with CH3CHF2 and CHC12CF3 have been determined overthe temperature range 295-388 K and a total pressure of 1 atm. The OH rate data were obtained using the absolute rate technique of pulse radiolysis combined with kinetic spectroscopy. The data can be fit to the Arrhenius expressions: kOH+HFC-152a=3.9 × 10-12 exp[(-1370±260)/T] cm3 molecule-1s-1 and kOH+HCF-123=1.1 × 10-12 × exp[(-940±200/T] cm3 molecule-1s-1. The results are compared to the available literature data and discussed in terms of reactivity trends and in the light of the important role CH3CHF2 and CHCl2CF3 play as alternatives to the fully halogenated chlorofluorocarbons.

OriginalsprogEngelsk
TidsskriftChemical Physics Letters
Vol/bind187
Udgave nummer3
Sider (fra-til)286-290
Antal sider5
ISSN0009-2614
DOI
StatusUdgivet - 6 dec. 1991

ID: 228197205