Fig. 6. Experimental (cyan) and simulated (black) CW-EPR spectra of the reaction mixture with 0.05 M CuI and 0.5 M 2-benzylpyridine (1), 0.5 M acetic acid and DMSO heated to 100 °C under O2 for 5 min, 10 min, 1 h and 4 h. The spectra were recorded at 100 K with a microwave power of 0.47 mW and a microwave frequency of 9.73 GHz. (A) The spectrum of species III, obtained by subtraction of the spectra obtained after 5 and 10 minutes is shown at the bottom with its corresponding simulated spectrum. (B) Zoom on the low-field components revealing the time-dependent evolution of the different species. The experimental spectra are normalized for comparison.
