Any group which increases the rate (relative to H) is called anactivating group. Any group with decreases the rate (relative to H) is called adeactivating group. ... Common deactivating groups (not a complete list): NO2, CF3, CN, halogens, COOH, SO3H.

Is nitro group activating or deactivating?

Under identical conditions, Reaction 2 is slower than Reaction 1. Thus, the nitro group is a deactivating group. All deactivating groups are electron-withdrawing groups.

Is OCH3 a strong activator?

Why is -OCH3 more strongly activating than -CH3 in electrophilic aromatic substitution? Facts I know: 1) More the electron density in benzene ring, the faster the reaction. 2) Lone pair on -OCH3 group undergoes resonance and makes ortho-para positions electron rich, and so does -CH3 by hyperconjugation.