Aryl Group Definition in Chemistry

What Is an Aryl Group?

The phenyl functional group is an aryl functional group derived from benzene.
The phenyl functional group is an aryl functional group derived from benzene.

Aryl Group Definition

An aryl group is a functional group derived from a simple aromatic ring compound where one hydrogen atom is removed from the ring. Usually, the aromatic ring is a hydrocarbon. The hydrocarbon name takes the -yl suffix, such as indolyl, thienyl, phenyl, etc. An aryl group is often simply called a "aryl". In chemical structures, the presence of an aryl is indicated using the shorthand notation "Ar".

This is also the same as the symbol for the element argon, but doesn't cause confusing because it's used in the context of organic chemistry and because argon is a noble gas, and thus inert.

The process of attaching an aryl group to a substituent is called arylation.

Examples: The phenyl functional group (C6H5) is an aryl functional group derived from benzene. The napththyl group (C10H7) is the aryl group derived from naphthalene.

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Helmenstine, Anne Marie, Ph.D. "Aryl Group Definition in Chemistry." ThoughtCo, Jun. 8, 2017, thoughtco.com/definition-of-aryl-group-604794. Helmenstine, Anne Marie, Ph.D. (2017, June 8). Aryl Group Definition in Chemistry. Retrieved from https://www.thoughtco.com/definition-of-aryl-group-604794 Helmenstine, Anne Marie, Ph.D. "Aryl Group Definition in Chemistry." ThoughtCo. https://www.thoughtco.com/definition-of-aryl-group-604794 (accessed January 23, 2018).