376-72-7Relevant articles and documents
A hydrogen peroxide catalytic oxidation method for preparing eight fluorine valeric acid
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Paragraph 0030; 0031; 0032; 0033, (2016/12/16)
The invention belongs to the field of organic chemistry, and relates to a method for preparing octafluorovaleric acid under the catalytic oxidation action of oxydol. The method comprises the following steps: 1) mixing oxydol, a phase-transfer catalyst or complexing agent and sodium tungstate in a mole ratio of 100:(0.7-1.2):(0.7-1.2), and heating the mixture to 85-90 DEG C; 2) adding octafluoropentanol into the mixture obtained in the step 1); and 3) adding BaCO3 powder to precipitate the sodium tungstate in the reaction mixture, stirring for 0.5-1.5 hours, cooling to 40-60 DEG C, and filtering to remove the precipitate. The invention provides an environment-friendly economically-feasible method for preparing octafluorovaleric acid; and by using the oxydol as the oxidizer, the reaction product is single, and the only expected reaction byproduct is water, thereby basically eliminating the pollution source of the oxidation process.
METHODS OF PREPARING FLUORINATED CARBOXYLIC ACIDS AND THEIR SALTS
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Page/Page column 40, (2011/05/06)
A method for preparing fluorinated carboxylic acids and theirs salts is described comprising subjecting a fluorinated alcohol of the general formula (A): A-CH2-OH to at least one first and at least one second oxidizing agent to produce a highly fluorinated carboxylic acid or their salts of the general formula (B): A-COO M+, wherein M+ represents a cation and wherein A in formulas (A) and (B) is the same and A represents the residue: Rf-[0]p-CX"Y"-[0]m-CX'Y'-[0]n-CXY- wherein Rf represents a fluorinated alkyl residue which may or may not contain one or more catenary oxygen atoms, p, m and n are independently from each other either 1 or O, X, X', X", Y, Y' and Y" are independently from each other H, F, CF3, or C2F5 with the proviso that not all of X, X', X", Y, Y' and Y' ' are H; or A represents the residue: R-CFX- wherein X and R are independently selected from a hydrogen, a halogen, or an alkyl, alkenyl, cycloalkyl, or aryl residue, which may or may not contain one or more fluorine atoms and which may or may not contain one or more catenary oxygen atoms; wherein said at least one first oxidizing agent is a compound that can be converted, by action of the second oxidizing agent, into a reactive species capable of oxidizing the fluorinated alcohol.
Conformational energies of perfluoroalkanes. 5. Dipole moments of H(CF2)nH and H(CF2)nI
Matsuo, Keizo,Stockmayer, Walter H.
, p. 3307 - 3311 (2007/10/02)
Dielectric and refractive index increments at 25°C are reported for some α,ω-dihydroperfluoroalkanes and α-hydro-ω-iodoperfluoroalkanes in benzene and CCl4. Similar measurements on perfluorocyclohexane and perfluoro-n-hexane are used to deduce effective atomic polarizations for fluorocarbons in solution. The dipole moments obtained lead to a somewhat smaller characteristic ratio for the perfluoroalkane chain than had earlier been estimated by Bates and Stockmayer.
