Haloalkanes and Haloarenes — Chemistry STD 12 Science — Question
Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryHaloalkanes and Haloarenes1 Mark
Question
Aryl halide is less reactive than alkyl halide towards nucleophilic substitution because:
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Answer
Aryl halide is less reactive than alkyl halide towards nucleophilic substitution because of the resonance stabilization and $sp^2$ hybridization of $C$ attached to halide.
Due to resonance, carbon$-$chlorine bond acquires partial double bond character,.
hence it becomes shorter and stronger, and thus, cannot be easily replaced by nucleophiles.
This effect is further enhanced by the $sp^2$ nature of the $C$ atom to which chlorine is attached.
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