431-89-0Relevant articles and documents
Polishchuk et al.
, p. 3933 (1970)
Absolute rates of intermolecular carbon-hydrogen abstraction reactions by fluorinated radicals
Shtarev, Alexander B.,Tian, Feng,Dolbier Jr., William R.,Smart, Bruce E.
, p. 7335 - 7341 (1999)
Using competition kinetic methodology, absolute rate constants for bimolecular hydrogen abstraction from a variety of organic substrates in solution have been obtained for the n-C4H9CF2CF2(·), n-C4F9(·), and i-C3F7(·) radicals. Fluorine substitution substantially increases the reactivity of alkyl radicals with respect to C-H abstraction, with the secondary radical being most reactive. A wide range of substrate reactivities (5200-fold) was observed, with the results being discussed in terms of an interplay of thermodynamic, polar, steric, stereoelectronic, and electrostatic/field effects on the various C-H abstraction transition states. Representative carbon-hydrogen bond dissociation energies of a number of ethers and alcohols have been calculated using DFT methodology.
Unusual conversion of perfluoromethylepoxycyclopentane into a linear β-aminovinylketone by C-C bond cleavage
Barten, Jan A.,Kadyrov, Alexander A.,Roeschenthaler, Gerd-Volker
, p. 101 - 103 (2002)
2,3,3,4,4,5,5-Heptafluoro-1-trifluoromethyl-1,2-epoxycyclopentane reacted with 2-isopropyl-acetophenone imine giving 2,3,3,4,4,5,5-heptafluoro-2-trifluoromethyl-1-(2′-isopropylimino- 2′-phenylethane) cyclopentan-1-ol, which in its turn underwent an intramolecular rearrangement yielding the linear 4,4,5,5,6,6,7,8,8,8-decafluoro-1-isopropylamino-oct-1-en-3-one, being characterized by X-ray structural analysis (triclinic, P-1, a = 920.5(2), b = 1027.9(3), c = 1127.4(3)pm, α = 110.99, β = 105.68°, γ = 96.75°).
METHOD AND APPARATUS FOR CONTINUOUSLY PRODUCING 1,1,1,2,3-PENTAFLUOROPROPANE WITH HIGH YIELD
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Paragraph 0110-0111, (2014/05/20)
A method and apparatus for method of continuously producing 1,1,1,2,3-pentafluoropropane with high yield is provided. The method includes (a) bringing a CoF3-containing cobalt fluoride in a reactor into contact with 3,3,3-trifluoropropene to produce a CoF2-containing cobalt fluoride and 1,1,1,2,3-pentafluoropropane, (b) transferring the CoF2-containing cobalt fluoride in the reactor to a regenerator and bringing the transferred CoF2-containing cobalt fluoride into contact with fluorine gas to regenerate a CoF3-containing cobalt fluoride, and (c) transferring the CoF3-containing cobalt fluoride in the regenerator to the reactor and employing the transferred CoF3-containing cobalt fluoride in Operation (a). Accordingly, the 1,1,1,2,3-pentafluoropropane can be continuously produced with high yield from the 3,3,3-trifluoropropene using a cobalt fluoride (CoF2/CoF3) as a fluid catalyst, thereby improving the reaction stability and readily adjusting the optimum conversion rate and selectivity.
PROCESS FOR THE SYNTHESIS AND SEPARATION OF HYDROFLUOROOLEFINS
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Page/Page column 12-14, (2008/12/07)
A process for the synthesis of fluorinated olefins of the formula CF3CF=CHX, wherein X is F or H comprising contacting hexafluoropropene with hydrogen chloride in the vapor phase, in the presence of a catalyst, at a temperature in the range from about 200 °C to about 350 °C, wherein the mole ratio of hydrogen chloride to hexafluoropropene is from about 2:1 to about 4:1, separating the 1-chloro-1,2,3,3,3-pentafluoro-1-propene, 1,1-dichloro-2,3,3,3-tetrafluoro-1-propene and hydrogen fluoride products from unreacted hexafluoropropene, and hydrogen chloride by distillation, hydrogenating either the 1-chloro-1,2,3,3,3-pentafluoro-1-propene, 1,1-dichloro-2,3,3,3-tetrafluoro-1-propene or mixture thereof over a catalyst, and dehydrochlorinating the said hydrogenation product to produce either 1225ye or 1234yf.