aryl group


Also found in: Dictionary, Medical, Wikipedia.
Related to aryl group: vinyl group, alkyl group, allyl group

aryl group

(âr`ĭl), in chemistry, group of atoms derived from benzenebenzene
, colorless, flammable, toxic liquid with a pleasant aromatic odor. It boils at 80.1°C; and solidifies at 5.5°C;. Benzene is a hydrocarbon, with formula C6H6.
..... Click the link for more information.
 or from a benzene derivative by removing one hydrogen that is bonded to the benzene ring (see radicalradical,
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. Important inorganic radicals include ammonium, NH4; carbonate, CO3 ; chlorate, ClO3
..... 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 toluenetoluene
or methylbenzene
, C7H8, colorless liquid aromatic hydrocarbon that melts at −95°C; and boils at 110.8°C;. It is insoluble in water but highly soluble in most organic solvents.
..... Click the link for more information.
 (methylbenzene). The xylyl group, (CH3)2C6H3, is derived from xylene (dimethylbenzene). Just as several different alkyl groupsalkyl group
, in chemistry, group of carbon and hydrogen atoms derived from an alkane molecule by removing one hydrogen atom (see radical). The name of the alkyl group is derived from the name of its alkane by replacing the -ane suffix with -yl, e.g.
..... 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 groupfunctional 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. Organic compounds are frequently classified according to the functional group or groups they contain.
..... 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.
References in periodicals archive ?
5) A combination of trimethoxy silanes with propyl and phenyl groups can be chosen to give the same proportions of alkyl and aryl groups that are present in the pre-formed silicone intermediate shown in Fig.
Therefore the procedure can be used to prepare just trisubstituted hydrazines with two identical and one different aryl groups [4].
2 shows that pasture and potato generally lead to a large decline in the O-alkyl and alkyl C groups with the aryl groups remaining relatively constant.
20] aryl groups, thienyl, furyl, and pyridyl groups; and R may optionally have attached thereto any of the following functional groups: [C.
One such polymer consists of phenolic chains with alkoxycarbonyl, alkyl, acyl, or aryl groups along with --OH, -NH or--SH groups.
He has found that, through site isolation of polymer-based emitters using bulky aryl groups or host-guest systems, it is possible to significantly reduce emission quenching in the solid state.

Full browser ?