EPR Spectrum and Heat of Dissociation of the Perylene Dimer Cation

The EPR spectrum of the perylene dimer cation, obtained by dissolving (perylene2)+ ClO4− in CH2Cl2 and in CH3CN, is reported. The proton coupling constants in CH2Cl2 are 1.913, 1.492, and 0.212 G, while the g value at − 80°C is 2.002601. The heat of dissociation in CH2Cl2 is estimated to be 8.6 kcal/mole.