Definition

Adjective: 1. Containing a closed ring of atoms of the same kind, especially carbon atoms: In chemistry, this term describes a molecular structure where the ring is composed of identical atoms. While it most commonly refers to carbon rings (carbocyclic compounds), it can technically apply to rings of other identical elements.

Usage Examples

• Adjective:
  • Benzene is a classic example of a homocyclic compound, as its ring consists solely of carbon atoms.
  • The chemist synthesized a new homocyclic compound with a five-membered sulfur ring.
  • In organic chemistry, many important molecules are homocyclic, meaning their cyclic structures are built from a single type of atom.

Advanced Usage

• "Homocyclic aromatic compound": This specifies a homocyclic ring that also exhibits aromaticity (special stability due to electron delocalization), like benzene or naphthalene.
  • Pyridine is not a homocyclic aromatic compound because its ring contains a nitrogen atom.

Variants and Related Words

• Carbocyclic (adj): A more specific term meaning a ring consisting only of carbon atoms. All carbocyclic compounds are homocyclic, but not all homocyclic compounds are carbocyclic (e.g., a ring of only sulfur atoms).
• Heterocyclic (adj): The direct antonym, describing a closed ring structure containing atoms of at least two different elements.

Synonyms

• Isocyclic (adj): A less common synonym with the same meaning.

Antonyms

• Heterocyclic (adj): Containing a ring made up of more than one kind of atom.

Adjective

1. containing a closed ring of atoms of the same kind especially carbon atoms