Benzenoid and Non-Benzenoid Aromatic Compound

### Benzenoid and Non-Benzenoid Aromatic Compounds **Benzenoid Compounds:** - **Definition:** Aromatic compounds containing at least one benzene ring. - **Structure:** Planar, cyclic, conjugated with alternating double bonds. - **Examples:** Benzene (C₆H₆), naphthalene (C₁₀H₈), anthracene (C₁₄H₁₀). - **Properties:** High stability due to delocalized π-electrons. **Non-Benzenoid Compounds:** - **Definition:** Aromatic compounds not containing a benzene ring. - **Structure:** Still planar and conjugated, but different ring structures. - **Examples:** Cyclooctatetraene (C₈H₈), azulene (C₁₀H₈). - **Properties:** Aromaticity derived from conjugation and cyclic structure, not benzene. Understanding these compounds involves recognizing their aromaticity criteria and stability, which are crucial in organic chemistry.