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 ?
Oxazolines are five-membered cyclic compounds with an endo-imino ether group.
1 December 2009 - US biopharmaceutical company Palatin Technologies Inc (AMEX: PTN) said today that the US Patent and Trademark Office (USPTO) has issued a patent covering a family of cyclic compounds that bind to natriuretic peptide receptor A (NPRA), including PL-3994, Palatin's lead heart failure drug candidate.
(Cranbury, NJ) has received a Notice of Allowance from the United States Patent and Trademark Office for its United States Patent Application Number 11/694,260, titled "Cyclic Natriuretic Peptide Constructs." Allowed claims cover a family of cyclic compounds that bind to natriuretic peptide receptor A (NPRA), including PL-3994, Palatin's lead heart failure drug candidate.
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.
miscellaneous cyclic compounds are collectively of uncertain

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