Phenols are aromatic compounds containing one or more hydroxyl (-OH) groups directly attached to the benzene ring. They exhibit unique chemical properties due to resonance stabilization.
Phenols are weak acids. Their acidity is higher than alcohols due to stabilization of phenoxide ion by resonance.
Phenolic compounds are used as antiseptics, disinfectants, antioxidants, and intermediates in drug synthesis.
Aromatic amines are compounds in which an amino group (-NH₂) is attached directly to an aromatic ring.
Aromatic amines are less basic than aliphatic amines because the lone pair of electrons on nitrogen participates in resonance with the benzene ring.
Aromatic amines undergo diazotization to form diazonium salts, which are important intermediates in dye and pharmaceutical synthesis.
Many drugs such as sulfonamides, local anesthetics, and dyes contain phenolic or aromatic amine groups. Understanding their chemistry is essential in medicinal chemistry and drug synthesis.