aromatic compound


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cy·clic com·pound

any compound in which the constituent atoms, or any part of them, form a ring. Used mainly in organic chemistry where: 1) numerous compounds contain rings of carbon atoms (carbocyclic compounds) or carbon atoms plus one or more atoms of other types (heterocyclic compounds), usually nitrogen, oxygen, or sulfur; 2) where the atoms in the ring are all of the same element (homocyclic or isocyclic compound); 3) where the ring is saturated or contains nonconjugated double bonds (alicyclic compound), the compound is similar in properties to the corresponding acyclic compound (for example, cyclohexane resembles hexane); 4) where the ring contains conjugated double bonds in a closed loop in which there are 4n + 2 (where n is an integer) delocalized π electrons (Hückel rule) (aromatic compound; for example, benzene, pyridine), it is more stable than the corresponding saturated ring and exhibits unusual chemical properties characteristic of itself and not of other types of rings or of acyclic compounds. These aromatic compounds have the ability to sustain an induced ring current.

cy·clic com·pound

(sik'lik kom'pownd)
Any compound in which the constituent atoms, or any part of them, form a ring. Used mainly in organic chemistry.
Synonym(s): closed chain compound.

aromatic compound

Any of the ring or cyclic compounds related to benzene, many having a fragrant odor.
See also: compound
References in periodicals archive ?
2002); since the metabolism of aromatic compounds by sulfate reducing bacteria involve activation of the aromatic ring by methylation, hydroxylation or carboxylation.
The reagents of the first group are used most frequently to sulfonate aromatic compounds.
It appears that the fermentation doesn't play a role in its levels in the wine at all--unlike the way some aromatic compounds work in white wines.
The major aromatic compounds extracted from oak in each type of barrel used in both trials were assayed by stir bar absorption extraction/gas chromatography/mass spectrometry and liquid chromatography/mass spectrometry.
The identified aromatic compounds in the oils produced in the Curie-point pyrolysis experiments are listed in Table 4.
Kaneka and RIKEN's Numata tried to synthesize PHA through biosynthesis by many microorganisms with a sole carbon source of aromatic compounds that make up lignin or similar aromatic compounds.
Among the topics are the accessibility of gases and liquids in carbons, characterizing advanced physical adsorption by nanoporous carbons, hydrophobicity and hydrophilicity in carbons, adsorption by phosphorous-containing carbons, unique characteristics and applications of zeolite-tempered carbon, adsorption by soft-templated carbons, adsorption behaviors of graphene and graphene-related materials, the catalytic removal of water-solved aromatic compounds by carbon-based materials, carbon-based catalyst support in fuel cell applications, and novel carbon materials for adsorbing carbon dioxide.
The molecules appear to be aromatic compounds called quinones, which are found in modern crinoids and other animals.
Cumin contains volatile aromatic compounds that are excreted in sweat, especially when consumed in large quantities.
There have been concerns about polycyclic aromatic compounds (PAC)--some of which are carcinogenic--in the Athabasca River system for some time.
Naphtha, a product of oil refining, is processed into either unsaturated hydrocarbon compounds called olefins or aromatic compounds.
Polypor Type C doesn't require low-temperature storage, it's also free of aromatic compounds, What differentiates the C material from Polypor Type A or B is finished plastic models are formed completely in white, improving the look and feel and making it a strong option for architectural or other presentation models, says voxeljet.