Abstract
A sterically crowded 6,8-di-(tert-butyl)-3H-phenoxazin-3-one 3 was prepared by coupling 3,5-di-(tert-butyl)-o-benzoquinone with p-aminophenol. The molecular structure of 3 was established with the aid of X-ray crystallography and the redox activity studied using cyclic voltammetry and ESR spectroscopy. The reduction of 3 with a potassium mirror led to the formation of persistent radical anion 3a and dianion 3b which were characterized by their absorption and luminescence spectra.
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