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(′ar·əl)

(organic chemistry) An organic group derived from an aromatic hydrocarbon by removal of one hydrogen.


 
 
(ăr'əl)
n.

An organic radical derived from an aromatic compound by the removal of one hydrogen atom.

 
Wikipedia: aryl
This article is about the aryl organic functional group. For the biological gene, see Aryl hydrocarbon receptor. For the fleshy covering of certain seeds, see aril.

In the context of organic molecules, aryl refers to any functional group or substituent derived from a simple aromatic ring. There are more specific terms, such as phenyl, to describe unsubstituted aryl groups and subsets of aryl groups (as well as arbitrarily substituted groups: see IUPAC nomenclature), but "aryl" is used for the sake of abbreviation or generalization.

A few different types of aryl groups. From left to right: phenyl, benzyl, tolyl, o-xylyl.
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A few different types of aryl groups. From left to right: phenyl, benzyl, tolyl, o-xylyl.


The simplest aryl group is phenyl, C6H5; it is derived from benzene. The tolyl group, CH3C6H4, is derived from toluene (methylbenzene). The xylyl group, (CH3)2C6H3, is derived from xylene (dimethylbenzene).

Biaryls may display axial chirality.

See also


 
 

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Copyrights:

Sci-Tech Dictionary. McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.  Read more
Medical Dictionary. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company Read more
Wikipedia. This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Aryl" Read more

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