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Question: Answered & Verified by Expert
The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is:
ChemistryGeneral Organic ChemistryJEE MainJEE Main 2019 (09 Apr Shift 1)
Options:
  • A A<B<C<D
  • B B<C<A<D
  • C D<B<A<C
  • D D<A<C<B
Solution:
1331 Upvotes Verified Answer
The correct answer is: D<A<C<B
Reactivity of E+ substitution∝πe- can be present on the aromatic compound.
Electrophilic substitution ∝+M ∝1-M
∝+HC ∝1-HC
∝+I ∝1-I

(order of e- density α electrophilic substitution)
Ring e- density is highest.
So B>C>A>D

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