cyclic 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.
References in periodicals archive ?
PL-3994 and the related family of cyclic compounds were discovered entirely in-house and are owned by Palatin.
Bioelectricity, vaccination, X-rays, inkjet printers (in an accident involving a soldering iron and a pen), Post-It notes, the chemical structure of cyclic compounds, Bose-Einstein statistics, and major concepts such as the nature of gravitation (Isaac Newton's apple falling from a tree) and specific gravity (Archimedes' observation of the way his body displaced water from his bath), were either discovered or inspired by serendipitous events.
The alcohols used in toiletries and other organic cyclic compounds that are part of perfume formulations have escaped the scrutiny of pollution control officials," he says, although "alcohol emissions are strictly controlled at the [manufacturing] lever.
He insists that the alcohols used in toiletries and other organic cyclic compounds that are part of perfume formulations have escaped the scrutiny of pollution control officials.
He will be remembered as being extremely productive in sugar synthesis (total as well as transformations), for his elegant steriochemical contributions to the conformational analysis of cyclic compounds, for general carbohydrate chemistry, aminosugars, antibiotics and blood group determinants.

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