Why does acetylation of the -NH 2 group of aniline reduce its activating effect?

Question

Why does acetylation of the -NH 2 group of aniline reduce its activating effect?, Acetylation increases the electron density on the nitrogen atom, leading to decreased activation., Acetylation enhances the resonance stabilization of the amino group, weakening its activating effect., Because the lone pair on the nitrogen atom is in conjugation with the carbonyl group in acetylated aniline. As a result, the lone pair of electrons on nitrogen is less available for donation to benzene ring by resonance, Acetylation decreases the steric hindrance around the amino group, making it less reactive.

MARKS App · Accepted Answer

Correct Option is : (C) Because the lone pair on the nitrogen atom is in conjugation with the carbonyl group in acetylated aniline. As a result, the lone pair of electrons on nitrogen is less available for donation to benzene ring by resonance

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