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Photochemical Properties of CH2=CH-CFCl-CF2Br (4-bromo-3-chloro-3,4,4-trifluoro-1-butene) and CH3-O-CH-(CF3)2 (methyl 2,2,2-trifluoroethyl-1-trifluoromethyl ether): OH Reaction Rate Constant, UV and IR Absorption Spectra.

Published

Author(s)

Vladimir L. Orkin, Larissa E. Martynova, Michael J. Kurylo III

Abstract

Abstract Rate constants for the reactions of hydroxyl radicals (OH) with methyl 2,2,2-trifluoroethyl-1-trifluoromethyl ether (CH3-O-CH-(CF3)2 and 4-bromo-3-chloro-3,4,4-trifluoro-1-butene (CH2=CH-CFCl-CF2Br) have been measured over the temperature range 230 K to 370 K to give the following Arrhenius expressions: k1 = 7.21×10-14×(T/298)^3.06×exp(+361/T), cm3 molecule-1 s-1 k2 = 6.45×10-13×exp(+424/T), cm3 molecule-1 s-1 Atmospheric lifetimes of compounds were estimated to be 67 days and 4.5 days, respectively. UV absorption spectrum spectra of CH2=CH-CFCl-CF2Br and (CH3-O-CH-(CF3)2 were measured between 164 nm and 260 nm at T = 295 K and IR absorption spectrum of CH3-O-CH-(CF3)2 was measured between 450 cm-1 and 1600 cm-1.
Citation
Journal of Physical Chemistry A

Keywords

hydroxyl, atmospheric lifetime, absorption spectra, 4-bromo-3-chloro-3, 4, 4-trifluoro-1-butene, methyl 2, 2, 2-trifluoroethyl-1-trifluoromethyl ether
Created July 7, 2017, Updated September 29, 2017