Abstract

In contrast to earlier reports good linear relationships are shown to exist between experimental diamagnetic susceptibility enhancements for some 50 aromatic and heteroaromatic ring systems and the corresponding resonance energies and/or aromaticity indices. Consequently there is no apparent justification for separate ‘classical’ and ‘magnetic’ concepts of aromaticity as earlier proposed. Good linear relationships are shown to exist between experimental diamagnetic susceptibility enhancements for a wide range of aromatic and heteroaromatic ring systems and the corresponding resonance energies and/or aromaticity indices, l A. Consequently there is no experimental justification for separate “classical” and “magnetic” concepts of aromaticity.

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