2015
DOI: 10.1039/c5cp03840e
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Atmospheric chemistry of (CF3)2CCH2: OH radicals, Cl atoms and O3rate coefficients, oxidation end-products and IR spectra

Abstract: The rate coefficients for the gas phase reactions of OH radicals, k1, Cl atoms, k2, and O3, k3, with 3,3,3-trifluoro-2(trifluoromethyl)-1-propene ((CF3)2C=CH2, hexafluoroisobutylene, HFIB) were determined at room temperature and atmospheric pressure employing the relative rate method and using two atmospheric simulation chambers and a static photochemical reactor. OH and Cl rate coefficients obtained by both techniques were indistinguishable, within experimental precision, and the average values were k1 = (7.8… Show more

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Cited by 13 publications
(9 citation statements)
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“…Moreover, it is also used as a water repellent, inert fluid, coating, and building block for producing perfluorinated polymers. 9–11…”
Section: Introductionmentioning
confidence: 99%
“…Moreover, it is also used as a water repellent, inert fluid, coating, and building block for producing perfluorinated polymers. 9–11…”
Section: Introductionmentioning
confidence: 99%
“…Both apparatuses have been used in the past and only brief descriptions of the experimental setups and methods are given herein. [15][16][17][18] 2.1 Chamber relative rate measurements: THALAMOS THALAMOS consists of three main components, (i) a cuboid Teflon reactor, 0.6 m 3 , housed in a climatic thermostatic cage (climatic box VT-4100, Vötsch industrietechnik, Germany) providing temperature regulation between 231 and 453 K, (ii) a set of 10 UV-A (PL-L 24 W/10/4P, Philips, Netherlands), and 10 UV-C (HNS-L 24 W 2G11, Osram, UK) photolysis lamps, equally spaced around the Teflon chamber inside the climatic box and (iii) FTIR and SIFT-MS detection setups.…”
Section: Methodsmentioning
confidence: 99%
“…Presently, there are no kinetic data for the reaction of HFO-1438ezy­( E ) with Cl atoms or NO 3 radicals available in the literature. The rate coefficient for the Cl-atom reaction is expected to be 30–100 times greater than the OH reaction rate coefficient. , The gas-phase Cl + HFO-1438ezy­( E ) reaction could possibly contribute to the atmospheric loss of HFO-1438ezy­( E ) in locations where elevated Cl atom concentrations are present. The higher Cl atom reactivity would compensate, in part, for the lower expected atmospheric abundance of Cl atoms relative to the OH radical.…”
Section: Atmospheric Implicationsmentioning
confidence: 99%
“…In the atmosphere, it can react with the primary atmospheric oxidants (OH radicals, Cl-atoms, NO 3 radicals, and O 3 ) via addition to the carbon–carbon double bond. Similar to the atmospheric chemistry of other HFOs, the predominant atmospheric loss process for ( E )-(CF 3 ) 2 CFCHCHF is expected to be reaction with the OH radical. To the best of our knowledge, there currently are no kinetic data for the gas-phase reaction or the reaction of ( E )-(CF 3 ) 2 CFCHCHF with other atmospheric oxidants currently available in the literature.…”
Section: Introductionmentioning
confidence: 98%