Compare the resonance energies of cyclooctatetraene (a) and styrene (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 cyclooctatetraene (a) and styrene (b). Is the resonance energy of (a) greater than, less than or equal to that of (b) ? (a) (b)

TestHub · Accepted Answer

Cyclooctatetraene is a non-planar tub with almost no resonance, and its planar form would be anti-aromatic. Styrene is planar, with the C=C conjugated to the benzene ring. So a < b.

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