Which of the following functional groups is activating in electrophilic aromatic

Question

Which of the following functional groups is activating in electrophilic aromatic substitution? A. Nitro group B. Chlorine C. Acyl group D. Hydroxyl group Which of the following functional groups is activating in nucleophilic aromatic substitution? 5 A. Nitro group meta to the leaving group B. Nitro group ortho or para to the leaving group C. Alkoxy group ortho or para to the leaving group D. Alkoxy group meta to the leaving group Which of the following is not true of halogen substituents on a benzene ring? A. They direct meta in electrophilic aromatic substitution. B. They deactivate in electrophilic aromatic substitution. C. They are leaving groups in nucleophilic aromatic substitution. D. More electronegative halogen substituents react faster in SNAr reactions.

Explanation / Answer

D Activating group

An activating group will be one that will increase the electron density on the ring. Thus in this case the OH group is activating as it has a lone pair .

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