High Accuracy OH Reaction Rate Constants of CH2=CF-CF3 and trans-CHF=CF-CF3 and IR Absorption Spectra
Vladimir L. Orkin, Larissa E. Martynova, Alexander N. Ilichev
Rate constants for the gas phase reactions of OH radicals with two isomers of tetrafluoropropene, CH2=CF-CF3 (k1) and trans-CHF=CH-CF3 (k2); were measured using a flash photolysis resonance-fluorescence technique over the temperature range 220 K to 370 K. The Arrhenius plots were found to exhibit a noticeable curvature. The temperature dependences of the rate constants are very weak and can be represented by the following expressions over the indicated temperature intervals: cm3 molecule-1 s-1 cm3 molecule-1 s-1 cm3 molecule-1 s-1 The atmospheric lifetimes due to reactions with tropospheric OH were estimated to be 12 and 19 days respectively under assumption of the well mixed atmosphere. IR absorption cross-sections were measured for both compounds and their global warming potentials were estimated.
, Martynova, L.
and Ilichev, A.
High Accuracy OH Reaction Rate Constants of CH2=CF-CF3 and trans-CHF=CF-CF3 and IR Absorption Spectra, Journal of Physical Chemistry A, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=832429
(Accessed December 6, 2023)