Haloarenes undergo electrophilic reactions on the benzene ring, including halogenation, nitration, sulphonation, and Friedel-Crafts reactions.
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Haloarenes, aromatic compounds containing halogen substituents on the benzene ring, undergo electrophilic aromatic substitution reactions. The most common reactions involve the replacement of a hydrogen atom on the benzene ring by an electrophile. Friedel-Crafts reactions, such as Friedel-Crafts alkylation and acylation, introduce alkyl or acyl groups, respectively, onto the benzene ring. Additionally, halogenation reactions can occur, where a hydrogen is replaced by another halogen. However, due to the resonance stabilization of the benzene ring, these reactions often require catalysts like Lewis acids to facilitate electrophilic attack on the aromatic system.