aryl group definition of aryl group in the Free Online Encyclopedia.

aryl group (âr`ĭl), in chemistry, group of atoms derived from benzene benzene (bĕn`zēn, bĕnzēn`), colorless, flammable, toxic liquid with a pleasant aromatic odor. It boils at 80.
..... Click the link for more information. or from a benzene derivative by removing one hydrogen that is bonded to the benzene ring (see radical radical, in chemistry, group of atoms that are joined together in some particular spatial structure and that take part in most chemical reactions as a single unit.
..... Click the link for more information. ). The simplest aryl group is phenyl, C₆H₅ ; it is derived from benzene. The tolyl group, CH₃C₆H₄, is derived from toluene toluene (tōl`y
..... Click the link for more information. (methylbenzene). The xylyl group, (CH₃)₂C₆H₃, is derived from xylene (dimethylbenzene). Just as several different alkyl groups alkyl group (ăl`kĭl), in chemistry, group of carbon and hydrogen atoms derived from an alkane molecule by removing one hydrogen atom
..... Click the link for more information. may be derived from certain alkanes, so may several aryl groups be derived from certain aromatic compounds; for example, three different tolyl groups can be formed from toluene by removing hydrogen from different locations relative to the methyl group. When a functional group functional group, in organic chemistry, group of atoms within a molecule that is responsible for certain properties of the molecule and reactions in which it takes part.
..... Click the link for more information. is joined with an aryl group, replacing the hydrogen that had been removed, a compound is formed whose characteristics depend largely on the functional group.