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 ?
ScinoPharm is expected to bring several anti-cancer products to market this year, also claiming to be involved in development of highly complex manufacturing technology as protein, carbohydrate chemistry and macro cyclic compounds, and expanding its small-molecule core technologies to peptides and proteins.
These cyclic compounds intermingle with the Corexit [dispersants] and generate other cyclic compounds that aren andrsquo;t good.

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