Provide basic information and examples of aromatic compounds.

(N/A) Aromatic compounds are cyclic compounds in which $(4n + 2)$ $\pi$ electrons are delocalized over the ring atoms,following $H$ückel's rule. They are classified into two main types:
$(a)$ Benzenoid compounds: These compounds contain at least one benzene ring in their structure. Examples include Benzene,Aniline,Phenol,Naphthalene,and Anthracene.
$(b)$ Non-benzenoid compounds: These aromatic compounds do not contain a benzene ring. If they contain a heteroatom $(N, O, S)$ in the ring,they are called heterocyclic aromatic compounds. Examples include Furan,Thiophene,Pyridine,and Tropolone.