STANDARDChemistry-Organic Chemistry
STANDARD Chemistry Electrophilic Aromatic Substitution MCQ Question
Type: MCQ-conceptual-Medium
The electrophile, E⁺ attacks the benzene ring to generate the intermediate σ-complex. Which σ-complex is of lowest energy?
A
(1)
B
(2)
C
(3)
D
(4)
Correct Answer
Option D
Detailed Explanation
The σ-complex with the lowest energy is the one where the positive charge is delocalized over the most stable positions. In this case, the complex shown in option 4 is the most stable due to resonance stabilization.
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