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 ?
Synthesis of alicyclic compounds in a regio- and stereocontrolled manner is a highly desirable transformation for the development of new pharmaceuticals, agrochemicals and other bio-active molecules.
The phosphorylation of AMPK and its target ACC were assessed by immunoblot analysis, where it is observed that aliphatic or alicyclic compounds 1-3 were not able to activate the enzyme (data not shown).
These may belong to different derivatives of mono- and bicyclic aromatic hydrocarbons, but also to alicyclic compounds. In [114] it is demonstrated that in group composition determination with TLC homologous series of alicyclic and aromatic-alicyclic (hybrid) compounds were identified between aliphatic and polycyclic aromatic hydrocarbons.