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Does resonance always lead to stabilizat...

Does resonance always lead to stabilization of cyclic conjugated systems ?

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Resonance is a hypothetical concept which has been developed to explain the extra stability of cyclic conjugated systems containing (4 n + 2) `pi`-electrons. In case of cyclic systems containing 4 n `pi`-electrons, resonance actually destabilizes the molecules and makes them antiaromatic though we can still write resonance structures as shown below :
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