JEE Main Chemistry question

Which of the following has the greatest (total) resonance energy?

(A)Diphenyl (biphenyl)
(B)Benzene
(C)Naphthalene
(D)PhenanthreneCorrect

Answer: (D)

Solution

Total (not per-ring) resonance energy increases with the number of fused aromatic rings; among these four, phenanthrene (three angularly-fused rings, resonance energy ≈ 92 kcal/mol) has substantially more total aromatic

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Question ID VK-140428