|Molar mass||218.20 g/mol|
|Melting point||107.5 to 108.5 °C (225.5 to 227.3 °F; 380.6 to 381.6 K)|
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
|what is: / ?)(|
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.
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 + HCl
- C6H4(ONa)2 + (FC6H4)2CO → 1/n[(C6H4O2)(C13H8O)]n + 2 NaF
- R.D. Dunlop and John H. Gardner (1933). "Preparation of Fluorbenzophenones". J. Am. Chem. Soc. 55 (4): 1665–1666. doi:10.1021/ja01331a058.
- David Parker, Jan Bussink, Hendrik T. van de Grampe, Gary W. Wheatley, Ernst-Ulrich Dorf, Edgar Ostlinning, Klaus Reinking "Polymers, High-Temperature" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2002.