Reinterpretation of the EPR Spectrum of N,N′-Tetramethylbenzidine Cation

The EPR spectrum of N,N,N′,N′-tetramethylbenzidine monocation has been completely reanalyzed and has been found to have the following hyperfine coupling constants in acetonitrile: aN=4.86 G, aH methyl=4.74 G, aH3,5,3′,5′=1.63 G, and aH2,6,2′,6′=0.79 G.