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 ?
The reagents of the first group are used most frequently to sulfonate aromatic compounds.
Aromatic compounds are generated in high amounts when the temperature is above 485[degrees]C.
This paper describes a case study in which three analytical techniques including GC/MS, GC/FID, and sonication were used to identify and characterize oil/grease, total petroleum hydrocarbons and volatile aromatic compounds BTEX in soil and sediment samples.
Some general tasting principles: a tulip glass retains aromas and reveals them with great delicacy; the temperature of the cognac should match the ambient temperature; a white background should be used to examine color and nuances; and the glass should be rotated to aerate and accelerate the release of aromatic compounds.
Bob was a natural product chemist and a world authority in his area of aromatic compounds.
They include a few top tips to ensure super salads: Use completely fresh *vegetables and fruits but make sure they are ripe so that the flavour and aromatic compounds (the fruit sugars) are properly developed.
Furanes are aromatic compounds derived from biomass with a structure similar to that of benzene.
In a consent agreement with EPA, the company has agreed to pay a $94,509 penalty for failing to file required annual reports on polycyclic aromatic compounds and benzo (g,h,i) perylene releases from its facility during calendar years 2002 through 2006.
Total aromatic compounds (%) Semi-skimmed cow's milk HYDROCARBONS 15% KETONES 14% ALDEHYDES 16% ALCOHOLS 16% LACTONES 8% ESTERS 11% NITROGEN AND SULPHUR COMPOUNDS 17% PHENOLS 3% Plain soy drink HYDROCARBONS 10% KETONES 19% ALDEHYDES 32% ALCOHOLS 20% SULPHUR COMPOUNDS 7% AROMATIC COMPOUNDS AND FURANS 12% Note: Table made from pie chart.
In this work, hydrogenation of aromatic compounds in light gas oil derived from Athabasca bitumen was carried out using a single- and two-stage hydrotreating processes.
The test centre includes a range of spray-dryers including the FSD drier (Fluidized Spray Drier), the new Integrated Filter Dryer, a spray dryer using inert drying gas (nitrogen) to prevent oxidisation of the fine aromatic compounds, and Ray-1 batch freeze-dryer.
As they have no unsaturated bonds, aromatic compounds or other impurities, Gemseals are not sensitive to heat, UV or pH, and meet LVP-VOC exemption.