JEE Main · 2024 · 01 Feb 2024 · Shift 1 · Hydrocarbons

Which of the following compound will most easily be attacked by an electrophile?

(A)(see structure)
(B)(see structure)
(C)(see structure)
(D)(see structure)
✓ Correct

Answer: (D)

Solution

Electrophilic aromatic substitution is favoured by higher electron density on the ring. Among the given substituents,

- OH

(phenol) is the strongest activator by resonance (+M effect), donating electron density into the ring more effectively than a methyl group (weak +I) and far more than halogen substituents (which are net deactivating by induction despite weak +M). So the phenol is attacked most easily by an electrophile.

JEE Main · 2024 · 01 Feb 2024 · Shift 1 · Single correct option

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