Compare the resonance energies of p-benzoquinone (a) and benzaldehyde (b). Is the resonance energy of (a) greater than, less than or equal to that of (b) ?
(a)
(b)

Question

Compare the resonance energies of p-benzoquinone (a) and benzaldehyde (b). Is the resonance energy of (a) greater than, less than or equal to that of (b) ? (a) (b)

TestHub · Accepted Answer

p-Benzoquinone is a cross-conjugated, non-aromatic compound. Benzaldehyde has an aromatic benzene ring in conjugation with the C=O group. So a < b.

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