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Why is this type of resonance not possible? My book says that the positive charge is localised, and resonance is not possible.
But I have drawn the resonance structures (though you can note that the last resonance structure can be obtained directly without disturbing the positive charge). Are the other structures not possible? It not, why?
Aromacity is not disturbed as all the structures have cyclic resonance and follow Hückel's rule. Please explain.