In electrophilic aromatic substitution,a halogen substituent is considered as

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Halogens are considered as weakly deactivating due to their electronegativity and withdrawing nature. They pull electron density away from the ring through induction and resonance effects, making it harder for electrophiles to attack the ring. However, the halogens can still exert some electron-donating effects through resonance, making them weakly activating as well. Overall, their deactivating effect dominates, making them weakly deactivating.

In Electrophilic Aromatic Substitution,a Halogen Substituent Is Considered as