Fluorobenzene

• Monofluorobenzene
• Phenylfluorid
• Fluorobenzene

Colorless liquid, benzene -like odor

Liquid

1.03 g · cm -3

-42 ° C

85 ° C.

81 hPa ( 20 ° C)

Almost insoluble in water ( 1.54 g · l-1 at 30 ° C)

1.4684 ( 30 ° C)

Risk

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Fluorobenzene ( C6H5F ) is an aromatic halogenated hydrocarbon. The molecule is built up, such as benzene, any of the six hydrogen atoms of the benzene is substituted with a fluorine atom.

Representation

A presentation by halogenation as chloro- and bromobenzene, is not possible. The synthesis is achieved by means of the Schiemann reaction. The synthesis begins with a diazotization of aniline. By adding a solution of sodium tetrafluoroborate ( NaBF4 ), the diazonium salt precipitated as tetrafluoroborate, the precipitate is washed, dried, and heated gently for implementation.

The reaction is also possible with aqueous HPF6.

Properties

Fluorobenzene is a colorless, flammable liquid and largely non-polar, therefore, very poorly soluble in water, soluble in alcohols, benzene and ethers. Starting from benzene to fluorobenzene a significant reduction in the melting point of 5.5 to -42 ° C is to be noted - by the insertion of a single substituent in the benzene highly symmetrical molecule. The boiling point of barely 80.1 increases, however, at 85 ° C.

Use

Fluorobenzene is a relatively inert compound. It is a good solvent for highly reactive components, a metal complex could, however, be crystallized.

Fluorination of fluorobenzene yields mainly 1,2- difluorobenzene.