1 Nucleophilic substitution
Aryl halides are extremely less reactive towards nucleophilic
substitution reactions due to the following reasons:
(i) Resonance effect : In haloarenes, the electron pairs on halogen
atom are in conjugation with p-electrons of the ring and the
following resonating structures are possible C—Cl bond acquires a partial double bond character due to
resonance As a result, the bond cleavage in haloarene is difficult
than haloalkane and therefore, they are less reactive towards
nucleophilic substitution reaction