Diamagnetic susceptibility exaltation, defined as the difference between the measured molar susceptibility and the susceptibility estimated neglecting the contribution of ring current, is found to be a property solely of aromatic compounds by calculating the exaltations of a wide variety of aromatic and nonaromatic hydrocarbons. Nonbenzenoid aromatic compounds exhibit exaltation, pseudoaromatic compounds do not. Exaltation is proportional to the theoretically calculated "London diamagnetism" of aromatic compounds. espite more than 30 years of strong interest in the
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