Question

# Aryl halides are extremely less reactive towards nucleophilic substitution reactions. Give any two reasons.

Solution

## Aryl halides are extremely less reactive towards nucleophilic substitution reactions.  This is due to following reasons1) Conjugation between the lone pair of electrons (on halogen atom ) and pi electrons ( of benzene ring).2) Double bond character of $$C-X$$ bond due to resonance. 3) The C atom of $$C-X$$ bond is $$sp^2$$ hybridised which results in greater s character and shorter bond length. $$C-X$$ bond is stronger and its cleavage requires greater energy.Chemistry

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