Cyclic hydrocarbons are carbon chains in a ring structure. They may contain multiple carbon atoms and may have single, double or triple bonds. The cyclic hydrocarbons have saturated single rings. Bridged cycloalkanes contain one or more pairs of carbon atoms common to two or more rings. The inclusive terms for any cyclic hydrocarbons having any number of such multiple bonds are cyclic olefins or cyclic acetylenes.
Aromatic hydrocarbons have a special cyclic structure composed of 6 carbon atoms known as a benzene ring. The bonds in the benzene ring are alternately single and double bonds. This structure is very stable. The bonds in the benzene ring are alternately single and double bonds. Cyclic hydrocarbons omitting hydrogen on any carbon atom called aryl are reactive and also bind with a functional group.