Electron propagator hyperfine splitting

The 4-line spectra shown in Fig. 26 b and 26c were observed for EP and AB. Simulation gave the hyperfine splitting constants given in Table 3. In both cases, the value of a 1 was the same as that of a 3, indicating that the unpaired electron of the propagating radical is completely delocalized over the allylic three carbons. 

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