aryl group


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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.
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 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
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). 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.
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 (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.
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 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.
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 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 ?
Depending on the experimental conditions (substrate, solvent), the film thickness can range from monolayer aryl groups (less than 1 nm) to a few hundred nanometers thick.
Methoxybenzene when the radical is grafted to the silicon surface, the orientation of bonds F (phenyl) -OCH3 is modified from the other radicals contain aryl groups such as NO2 and F-Br the bond F-Br remains perpendicular to the surface of silicon.
The aryl radicals are also susceptible to reacting with the aryl groups bonded to the surface at the ortho to para-position substituted group, resulting in the formation of multilayer structures with polyphenylene [59, 60] as shown in Fig.
Daasbjerg, General approach for monolayer formation of covalently attached aryl groups through electrografting of arylhydrazines, J.
Podvorica, Time-of-flight secondary lon mass spectroscopy characterization of the covalent bonding between a carbon surface and aryl groups, Langmuir.
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.
Unlike the Waco soil, however, contributions from functional groups other than aryl groups are evident even after 45 years of cultivation.
20] aryl groups, thienyl, furyl, and pyridyl groups; and R may optionally have attached thereto any of the following functional groups: [C.

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