Question

Why are haloalkanes more reactive towards nucleophilic substitution reactions than haloarenes?

Answer 1

Haloalkanes are more susceptible to nucleophilic substitution processes than haloarenes due to their weaker carbon-halogen bonds. The strength of the carbon-halogen bond determines how easily a nucleophile can replace the departing halide ion. The C-X bond in an aryl halide takes on a partial double bond character due to resonance.