Hexafluorobenzene

Hexafluorobenzene is a fluorocarbon derivative of benzene, and is one of the most stable and inert chemical compounds of the fluorine and carbon elements. It is a colorless liquid that boils slightly above room temperature and has a distinctively sweet, ether-like odor.

Structure and Properties

Hexafluorobenzene (C6F6) is a planar molecule that features six fluorine atoms symmetrically distributed around a central benzene ring. The carbon-fluorine bonds in hexafluorobenzene are among the strongest in organic chemistry, contributing to the molecule's remarkable stability and resistance to chemical reactions.

The molecular geometry of hexafluorobenzene is regular hexagonal, with bond angles of 120 degrees. The carbon-fluorine bond length is approximately 1.35 angstroms. The molecule's symmetry gives it a zero dipole moment, meaning it does not have a net electrical charge.

Synthesis

Hexafluorobenzene can be synthesized by the direct fluorination of benzene using elemental fluorine, a process that requires carefully controlled conditions due to the highly reactive nature of fluorine. Alternatively, it can be produced by the pyrolysis of a suitable precursor such as pentafluorophenyl trifluoromethanesulfonate.

Uses

Due to its high stability and low reactivity, hexafluorobenzene is used as a solvent in high-temperature reactions. It is also used in the manufacture of fluoropolymers and as a tracer in environmental science studies.

Safety

Hexafluorobenzene is considered a low hazard substance. However, it can cause irritation to the eyes, skin, and respiratory tract. It is recommended to handle it with appropriate protective equipment and in a well-ventilated area.

See Also

• Fluorocarbon
• Benzene
• Chemical compound
• Fluorine
• Carbon
• Planar molecule
• Chemical reaction
• Molecular geometry
• Dipole moment
• Pyrolysis
• Fluoropolymer
• Environmental science