Carbon compounds with more than one halogen atom are termed polyhalogen compounds. Dichloromethane finds applications as a solvent, paint remover, propellant in aerosols, and in drug manufacturing as well as metal cleaning and finishing.

The halogen atom’s –I effect and deactivating influence, along with resonance, make the benzene ring in haloarenes somewhat deactivated compared to benzene. As a result, electrophilic substitution reactions in haloarenes occur more slowly and require more drastic conditions than those ...

The halogen atom in haloarenes, being o, p-directing, directs further substitution to the ortho- and para-positions with respect to itself due to resonance, resulting in increased electron density at these positions.

Haloarenes undergo electrophilic reactions on the benzene ring, including halogenation, nitration, sulphonation, and Friedel-Crafts reactions.

The resonance effect in aryl halides, where electron pairs on the halogen atom are in conjugation with p-electrons of the ring, imparts partial double bond character to the C—X bond, making bond cleavage difficult and contributing to the lower reactivity ...