Abstract
AbstractThe observed spin densities for the radical cation and anion of trans‐15,16‐di‐methyl‐dihydropyrene (I) are in good agreement with MO predictions based on unrestrained delocalisation in the peripheral 14‐membered π‐electron system. The symmetry of the MO's occupied by the unpaired electron in the two cases suggests that the central «butane» unit acts as an electron releasing group in the radical cation and as an electron accepting group in the radical anion.
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