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By means of nanosecond laser photolysis and steady-state photolysis at room temperature, it is concluded as follows: (1) Both the lowest excited triplet states of flavanone and flavone with mixed nπ * -ππ * character abstract a hydrogen atom from ethanol generating the solute and solvent radicals. (2) The radical species of flavanone is undoubtedly its ketyl radical yielding the pinacol-type...
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