Aryl halide is less reactive than alkyl halide towards nucleophil… - Vidyadip

MCQ

Aryl halide is less reactive than alkyl halide towards nucleophilic substitution because:

A
Of less stable carbonium ion
B
Due to large $\text{C−Cl}$ bond energy
C
Of inductive effect
✓
Of resonance stabilization and $sp^2$ hybridization of $C$ attached to halide.

✓

Answer

Correct option: D.

Of resonance stabilization and $sp^2$ hybridization of $C$ attached to halide.

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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