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: