Aromatic compounds electric ring current

Clearly enough, rotativities formulation and consequently the theory from which it proceeds are still not perfectly adequate but this does not diminish the significance of experimental evidence. The important fact is that benzene and similar compounds offer the exceptional case in which it is absolutely impossible to disregard the influence of the external electric field in various liquid media. The reason why this influence is so importatnt for aromatic molecules remains open to discussion but, as it has already been said, it might well be that ring currents are extremely sensitive towards electric fields. 

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