Journal of Physical Chemistry p. 10875 - 10879 (1992)
Update date:2022-08-11
Topics:
Nielsen, Ole J.
Ellermann, Thomas
Sehested, Jens
Wallington, Timothy J.
The ultraviolet absorption spectrum and kinetics and mechanism of the self-reaction of CHF2CF2O2 radicals have been studied in the gas phase at 298 K.Two techniques were used: pulse radiolysis UV absorption to measure the spectrum and kinetics and long-path-length Fourier transform infrared spectroscopy (FTIR) to identify and quantify the reaction products.Absorption cross sections were quantified over the wavelength range 220-270 nm.At 230 nm, ?CHF2CF2O2 = (3.2 +/- 0.5) * 10-18 cm2 molecule-1.Errors are statistical (2 standard deviations) plus our estimate of potential systematic uncertainty (15percent).This absorption cross section was used to derive the observed self-reaction rate constant for the reaction CHF2CF2O2 + CHF2CF2O2 -> products (1), defined as -d
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