58194-00-6Relevant articles and documents
Dissociation constants of polyfluorocarboxylic acids
Chechina,Sokolov,Berenblit,Soshin
, p. 1770 - 1772 (2007)
The effect of the structure and molecular weight of fluorocarboxylic acids on their dissociation constants in acetonitrile and its mixtures with water and methanol was studied.
Selective reaction of hexafluoropropylene oxide with perfluoroacyl fluorides
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Page 3, (2010/02/07)
A method is provided for reacting hexafluoropropylene oxide (HFPO) with a perfluoroacyl fluorides according to the formula X—Rf—COF (II) to selectively produce a monoaddition product according to the formula X—Rf—CF2—O—CF(CF3)COF (I), wherein selectivity for the monoaddition product over the biaddition product is 90% or greater or more typically 95% or greater. A continuous or repeated-batch process is provided comprising the steps of: a) providing a mixture of X—Rf—COF (II), a fluoride salt, and a polar solvent; b) adding hexafluoropropylene oxide (HFPO) in an amount such that X—Rf—COF remains in molar excess of HFPO by at least 10% and reacting X—Rf—COF with HFPO; c) separating unreacted X—Rf—COF from a mixture of addition products of hexafluoropropylene oxide (HFPO) and X—Rf—COF; and d) repeating step a) using unreacted X—Rf—COF separated in step c).
