an aryl is any functional group or substituent derived from an aromatic ring, usually an aromatic hydrocarbon, such as phenyl and naphthyl. "Aryl" is...

groups. Illustrative is the synthesis of 2-fluoronitrobenzene from 2-nitrochlorobenzene: O2NC6H4Cl + KF → O2NC6H4F + KCl Aryl chlorides are the aryl halides...

class of compounds that contain an ether group—an oxygen atom bonded to two organyl groups (e.g., alkyl or aryl). They have the general formula R−O−R′,...

hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in...

are aryloxy groups, which have an aryl group singularly bonded to oxygen such as the phenoxy group (C6H5O−). An alkoxy or aryloxy group bonded to an...

salts are a group of organic compounds sharing a common functional group [R−N+≡N]X− where R can be any organic group, such as an alkyl or an aryl, and X is...

polyatomic ions of the structure [NR4]+, where R is an alkyl group, an aryl group or organyl group. Unlike the ammonium ion (NH+4) and the primary, secondary...

is an organic alkyl or aryl group and the S(=O)2(OH) group a sulfonyl hydroxide. As a substituent, it is known as a sulfo group. A sulfonic acid can be...

groups are aryl groups which are commonly found in the structure of diverse chemical compounds. They are considered nonpolar and hydrophobic groups....

organic compounds bearing the functional group diazenyl (R−N=N−R′, in which R and R′ can be either aryl or alkyl groups). IUPAC defines azo compounds as: "Derivatives...

central nervous system effects. Ar denotes an aryl group; here specifically being benzodioxol-3-yl. Benzyl group Methylphenidate is a benzylpiperidine Janssen...

Left: general chemical structure of profens (Ar = aryl group). Right: chemical structure of ibuprofen...

group, or phenyl ring, is a cyclic group of atoms with the formula C6H5, and is often represented by the symbol Ph (archaically φ). The phenyl group is...

alkenyl, aryl, benzyl, acyl X {\displaystyle {\color {Red}{\ce {X}}}} : halides (Cl, Br, I), pseudohalides (OTf, OPO(OR)2), OAc The R1 group attached...

acid (B(OH)3) in which one of the three hydroxyl groups (−OH) is replaced by an alkyl or aryl group (represented by R in the general formula R−B(OH)2)...

organic compounds bearing the functional group R−N=N−R′, in which R and R′ are usually aryl and substituted aryl groups. They are a commercially important family...

R−CH2−C6H5. Benzyl features a benzene ring (C6H6) attached to a methylene group (−CH2−) group. In IUPAC nomenclature, the prefix benzyl refers to a C6H5CH2 substituent...

Schiff) is a compound with the general structure R1R2C=NR3 (R3 = alkyl or aryl, but not hydrogen). They can be considered a sub-class of imines, being either...

methylation of alkoxides. Some aryl methoxides can be synthesized by metal-catalyzed methylation of phenols, or by methoxylation of aryl halides. Streitwieser...

exhaustive halogenation of an acetyl group (R−C(=O)CH3, where R can be either a hydrogen atom, an alkyl or an aryl group), in the presence of a base. The...

dyes. Triarylmethane dyes can be grouped into families according to the nature of the substituents on the aryl groups. In some cases, the anions associated...

any organyl group, R, although Alk is sometimes used to specifically symbolize an alkyl group (as opposed to an alkenyl group or aryl group). Ordinarily...

polysulfides generally have the formulae R1SnR2, where R is an alkyl or aryl group. The alkali metal polysulfides arise by treatment of a solution of the...

is R1R2R3Si−O−R4 where R4 is an alkyl group or an aryl group. Silyl ethers are usually used as protecting groups for alcohols in organic synthesis. Since...

Isocyanides are compounds in which the O is replaced by an NR (R = alkyl or aryl) group and have a similar bonding scheme. If carbon monoxide acts as a ligand...

(respectively) an ene- or aryl-substituted cyclopropane. Formally, it amounts to a 1,2 shift of one ene group (in the diene) or the aryl group (in the allyl-aromatic...

Archimedes number in fluid dynamics Argon, symbol Ar, a chemical element Aryl group in organic chemistry Relative atomic mass, symbolized as Ar Anti-reflective...

scope and functional group tolerance. The development of the Buchwald–Hartwig reaction allowed for the facile synthesis of aryl amines, replacing to an...

as R−C(O)OH with R referring to an organyl group (e.g., alkyl, alkenyl, aryl), or hydrogen, or other groups. Carboxylic acids occur widely. Important examples...

that substituted aryl group migrates in preference. Inspection of the alternative phenonium-type species, in which an aryl group has begun to migrate...