Fluorocarbon
Compound Melting point ( °C ) Boiling point ( °C )
Hexafluorobenzene 5.3 80.5
Benzene 5.5 80.1
Octafluorotoluene < −70 102-103
Toluene −95 110.6
Perfluoro ( ethylbenzene ) 114-115
Ethylbenzene −93.9 136.2
Octafluoronaphthalene 86-87 209
Naphthalene 80.2 217.9
Perfluoroaromatic compounds
Perfluoroaromatic compounds contain only carbon and fluorine , like other fluorocarbons , but also contain an aromatic ring . The three most important examples are hexafluorobenzene , octafluorotoluene , and octafluoronaphthalene . Perfluoroaromatic compounds Hexafluorobenzene Perfluoroaromatic compounds can be manufactured via the Fowler process , like fluoroalkanes , but the conditions must be adjusted to prevent full fluorination . They can also be made by heating the corresponding perchloroaromatic compound with potassium fluoride at high temperature ( typically 500 °C ) , during which the chlorine atoms are replaced by fluorine atoms . A third route is defluorination of the fluoroalkane ; for example , octafluorotoluene can be made from perfluoromethylcyclohexane by heating to 500 °C with a nickel or iron catalyst . [ 30 ] Perfluoroaromatic compounds are relatively volatile for their molecular weight , with melting and boiling points similar to the corresponding aromatic compound , as the table below shows . They have high density and are non-flammable . For the most part , they are clear , colorless liquids ( octafluoronaphthalene , a yellow solid , is an exception ) . Unlike the perfluoralkanes , they tend to be miscible with common solvents . [ citation needed ]
Fluorocarbons, sometimes referred to as perfluorocarbons or PFCs, are, strictly speaking, organofluorine compounds with the formula CF, i.e. they contain only carbon and fluorine, though the terminology is not strictly followed. Compounds with the prefix perfluoro- are hydrocarbons, including those with heteroatoms, wherein all C-H bonds have been replaced by C-F bonds. Fluorocarbons can be perfluoroalkanes, fluoroalkenes and fluoroalkynes and perfluoroaromatic compounds. Fluorocarbons and their derivatives are used as fluoropolymers, refrigerants, solvents, and anesthetics.