Cyclic compound

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.

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:

Example of ring-opening reactions:

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