The magnetic circular dichroism (MCD) of six polycyclic aromatic hydrocarbons (naphthalene, anthracene, phenanthrene, 1,2-benzanthracene, picene, and 1,2–3, 4-dibenzanthracene) has been measured in the α (1Lb) absorption region. A band in the MCD spectrum of anthracene which does not correspond to any reported absorption band has been assigned to the hitherto unobserved α band. The sign and magnitude of the MCD's observed are in good agreement with those calculated using CNDO wave-functions.
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