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crystal engineering
A crystal engineering approach is used to stabilize the radical anion in a series of crystalline alkali metal salts of 2,3-dicyano-5,6-dichlorosemiquinone (DDQ
). The radical anions form close pairs connected by π–π interactions, and the short interplanar distances are correlated with observed spin coupling.
). The radical anions form close pairs connected by π–π interactions, and the short interplanar distances are correlated with observed spin coupling.
