Which of the following sets of substituents are all deactivating groups in electrophilic aromatic substitution reactions? A) Cl, OH, CH₂CH₃ B) CH₃, Br, COCH₃ C) CH₃, NH₂, OH D) COCH₃, NO₂, Br

Question

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Deactivating groups are those that withdraw electron density from the aromatic ring, making it less reactive towards electrophilic aromatic substitution. COCH3 (an acyl group), NO2 (a nitro group), and Br (a halogen) are all electron-withdrawing groups, thus deactivating the aromatic ring.

Which of the Following Sets of Substituents Are All Deactivating