Abstract
AbstractTreatment of the dimer of 2‐arylphenanthro[9,10‐d]imidazoles with nucleophilic compounds such as alcohols, aliphatic amines, and carboxylic acids afforded 2‐substituted‐2H‐ and 4‐substituted‐4H‐2‐arylphenanthro[9,10‐d]isoimidazoles. These products showed a characteristic photochromism by dissociation to a stable imidazolyl radical.
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