Scheme 4. Toluene Solution X-Band EPR Spectra of (top) 4 with 40 equiv of N,N-Dipropyl-4-fluoroaniline Recorded at 23 °C, (middle) 4 with 40 equiv of N-Allyl-N-propyl-4-fluororaniline Recorded at (left) 23 °C or (right) 10 K, and (bottom) 4 with 40 equiv of (1-(Allyloxy)allyl)benzene Recorded at 23 °C (Conditions: Microwave Frequency, 9.37 GHz; Power, 2.0 mW; Modulation, 0.6325 mT/100 kHz).