high electron density due to the presence of three \[\pi \]-electron pairs (\[6\pi
\]-electrons)above and below the plane of the ring representing double bond.
Due to rich source of electrons benzene attracts the
electrophile (electron-deficient) reagents towards it and repels nucleophile
(electron-rich) reagent. Therefore, benzene undergoes electrophilic substitution
reactions easily and nucleophilic substitutions with difficulty.
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