Which of the following are deactivating groups?
$-OH, -COCH_3, -NO_2, -NH_2, -Cl, -Br, -NHCOCH_3, -COOH$
$-OH, -COCH_3, -NO_2, -NH_2, -Cl, -Br, -NHCOCH_3, -COOH$
(D) In electrophilic aromatic substitution,groups are classified based on their effect on the electron density of the benzene ring.
$1$. Activator groups (electron-donating): $-OH, -NH_2, -NHCOCH_3$.
$2$. Deactivator groups (electron-withdrawing): $-COCH_3, -NO_2, -Cl, -Br, -COOH$.
$1$. Activator groups (electron-donating): $-OH, -NH_2, -NHCOCH_3$.
$2$. Deactivator groups (electron-withdrawing): $-COCH_3, -NO_2, -Cl, -Br, -COOH$.
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