Cyclic compound
From Wikipedia, the free encyclopedia
In organic chemistry, a cyclic compound is a compound in which a series of carbon atoms are connected to form a loop or ring.[1] Benzene is a well known example. The term "polycyclic" is used when more than one ring is formed in a single molecule for instance in naphthalene, and the term macrocycle is used for a ring containing more than a dozen atoms.
 Benzene, a simple cyclic compound. |
 Naphthalene, a simple polycyclic compound. |
 Porphyrin, a simple macrocyclic compound. |
Cyclic compounds can be categorized:
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[edit] Ring-closing & opening reactions
Related concepts in organic chemistry are so-called ring-closing reactions in which a cyclic compound is formed and ring-opening reactions in which rings are opened.
Examples of ring-closing reactions:
- Ring-closing metathesis
- Nazarov cyclization reaction
- Ruzicka large ring synthesis
- Dieckmann condensation
- Wenker synthesis
Example of ring-opening reactions:
- A general type of polymerization reaction: Ring-opening polymerization
- Ring opening metathesis polymerisation
[edit] External links
[edit] References
- ^ March, Jerry (1985), Advanced Organic Chemistry: Reactions, Mechanisms, and Structure (3rd ed.), New York: Wiley, ISBN 0-471-85472-7
