Formula C13H8OF2 Appearance Colorless Solid | Molar mass 218.2 g/mol | |
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4,4’-Difluorobenzophenone is an organic compound with the formula of (FC6H4)2CO. This a colorless solid is commonly used as a precursor to PEEK, or polyetherether ketone, a so-called high performance polymer. Because PEEK is resistant to attack, it is commonly used in carbon fiber coatings and cable insulation.
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Synthesis
4,4’-Difluorobenzophenone is prepared by the acylation of fluorobenzene with p-fluorobenzoyl chloride. The conversion is typically conducted in the presence of an aluminium chloride catalyst in a petroleum ether solvent.
FC6H5C(O)Cl + C6H5F → (FC6H4)2CO + HClUses
The polymer PEEK is generated from the reaction of 4,4'-difluorobenzophenone with the salts of 1,4-benzenediol.
C6H4(ONa)2 + (FC6H4)2CO → 1/n[(C6H4O2)(C13H8O)]n + 2 NaFReferences
4,4'-Difluorobenzophenone Wikipedia(Text) CC BY-SA