| Revision as of 20:02, 6 April 2008 editV8rik (talk | contribs)Autopatrolled, Extended confirmed users, Pending changes reviewers, Rollbackers16,348 editsm merged with cyclic aldehyde← Previous edit | Revision as of 17:01, 23 May 2008 edit undoRifleman 82 (talk | contribs)Extended confirmed users32,435 edits +galleryNext edit → | ||
| Line 1: | Line 1: | ||
| In ], a '''cyclic compound''' is a ] in which a series of carbon atoms are connected to form a loop or ring |
In ], a '''cyclic compound''' is a ] in which a series of carbon atoms are connected to form a loop or ring.<ref>{{JerryMarch}}</ref> ] is a well known example. The term "polycyclic" is used when more than one ring is formed in a single molecule for instance in ], and the term ] is used for a ring containing more than a dozen atoms. | ||
| <gallery> | |||
| The term "polycyclic" is used when more than one ring is formed in a single molecule for instance in ], and the term ] is used for a ring containing more than a dozen atoms. | |||
| Image:Benzene bonds.svg|Benzene, a simple cyclic compound. | |||
| Image:Naphthalene.png|Naphthalene, a simple polycyclic compound. | |||
| Image:Porphyrin.svg|Porphyrin, a simple macrocyclic compound. | |||
| </gallery> | |||
| Cyclic compounds can be categorized: | Cyclic compounds can be categorized: | ||
| Line 12: | Line 16: | ||
| * ] | * ] | ||
| Cyclic aldehydes are aldehydes that have their -CHO group bonded directly to the ring. The suffix is -'''carbaldehyde'''. | Cyclic aldehydes are aldehydes that have their -CHO group bonded directly to the ring. The suffix is -'''carbaldehyde''' or '''carboxaldehyde'''. | ||
| == Ring-closing & opening reactions == | == Ring-closing & opening reactions == | ||
Revision as of 17:01, 23 May 2008
In organic chemistry, a cyclic compound is a compound in which a series of carbon atoms are connected to form a loop or ring. 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:
Cyclic aldehydes are aldehydes that have their -CHO group bonded directly to the ring. The suffix is -carbaldehyde or carboxaldehyde.
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
External links
- Polycyclic+Compounds at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
- Macrocyclic+Compounds at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
References
- March, Jerry (1985). Advanced Organic Chemistry: Reactions, Mechanisms, and Structure (3rd ed.). New York: Wiley. ISBN 9780471854722. OCLC 642506595.