Complex molecules, consisting of many atoms chemically bonded together, may have atoms arranged linearly or in rings.Heterocyclic and homocyclic compounds are examples of molecules in which the constituent atoms form rings. The cyclic portion of the...

A ring compound, also called a cyclic compound, is one whose molecules contain atoms chemically bonded together to create a closed chain or circle. Generally, such molecules are organic, and so the ring configuration is composed of carbon atoms. Ring...

Any of a class of organic compounds whose molecules contain one or more rings of atoms with at least one atom (the heteroatom) being an element other than carbon, most frequently oxygen, nitrogen, or sulfur. As in regular cyclic hydrocarbons, such...

These have a ring structure with at least one ring carbon replaced. The most common contain oxygen or nitrogen. About half of all natural compounds are heterocyclic and can be aliphatic or...

Heterocyclic compounds are organic compounds that contain a ring structure containing atoms in addition to carbon, such as sulfur, oxygen or nitrogen, as part of the ring. They may be either simple aromatic rings or non-aromatic rings. Some examples are...