Y. Morita et al., New stable neutral radical with intramolecular hydrogen bonding: Synthesisand characterization of 2,5,8-tri-tert-butyl-7-hydroxy-6-oxophenalenoxyl, ORG LETT, 3(20), 2001, pp. 3099-3102
A new stable neutral radical with intramolecular hydrogen bonding, 2,5,8-tr
i-tert-butyl-7-hydroxy-6-oxophenalenoxyl, was synthesized from the correspo
nding dihydroxyphenalenone and isolated as a stable solid under air atmosph
ere at room temperature. The structure was unequivocally determined by mean
s of IR spectra, ESR/ENDOR techniques, and DFT calculations.