aromatic compound

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Related to Aromatic compounds: Aliphatic Compounds

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 ?
Treatment of both red must and wine with silicone resulted in a large reduction in several MPs and, importantly, without significantly changing desirable aromatic compounds. (4,8,26) Similar results have been reported in red wine with elevated concentrations of IPMP, IBMP and SBMP when treated with a biodegradable polylactic acid-based polymer.
Due to the absence of aromatic compounds in Nujol oil, no ultraviolet absorption bands were observed, in agreement to the mid-infrared spectra discussed before.
Lee, "Detection of known photochemical decomposition products of PAH in particulate matter from pollution episodes in Seoul, Korea," Polycyclic Aromatic Compounds, vol.
These observations are in accordance with previously reports by Caldwell and Suflita (2000) and Coates et al., (2002); since the metabolism of aromatic compounds by sulfate reducing bacteria involve activation of the aromatic ring by methylation, hydroxylation or carboxylation.
Uchihashi et al., "Anaerobic degradation of aromatic compounds by Magnetospirillum strains: isolation and degradation genes," Bioscience, Biotechnology, and Biochemistry, vol.
Aromatic compounds are generated in high amounts when the temperature is above 485[degrees]C.
A total of 39 compounds were identified from the four samples with the major constituents being derivatives of 2-(2-phenylethyl) chromone aromatic compounds sesquiterpenes monoterpenes sterol compounds and fatty acid methyl ester.
It was found that the bacteria Ralstonia eutropha H16 (Cupriavidus necator), known to be a producing strain for PHA, biosynthesized PHA from the lignin component 4-Hydroxybenzoic acid (4-HBA) and numerous other aromatic compounds. 4-HBA achieves good productivity, with PHA accumulation within the microorganism reaching around 63 wt% of dry cell weight.
Aromatic compounds identification was performed using a mass spectrometer (Agilent) coupled to a gas chromatograph, using the same column (CP-Sil 5 CB) temperature conditions, and flows into detection; helium gas was used as carrier, with the source temperature 230[degrees]C, 250[degrees]C cuadropole, an emission of 34.6 eV (electron Volts), scanning speed of 3 seconds, and a mass range of 35 to 350 m/s.
Chlorinated aromatic compounds including chlorobenzenes, chlorobenzoates, chlorophenols, chloroanilines, hexachlorobenzene, polychlorinated biphenyl, chloronitrophenols, chloroaminophenols, and atrazine comprise a major group of environmental pollutants that are used in the manufacture of dyes, drugs, pesticides, and other industrial products [1-7].
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.