Aryl halides are organic compounds that consist of an aromatic ring bonded to a halogen atom, such as fluorine, chlorine, bromine, or iodine. These compounds are derived from benzene or other aromatic systems, where one or more hydrogen atoms are replaced by halogen atoms. Aryl halides are important in various chemical reactions and serve as intermediates in the synthesis of pharmaceuticals and agrochemicals. The presence of the halogen atom in aryl halides affects their chemical properties, making them useful in electrophilic substitution reactions. They can also participate in nucleophilic substitution reactions, although these processes are generally less favorable compared to aliphatic halides. Aryl halides are widely studied in organic chemistry for their reactivity and applications.