Fig. 7. (A) Co-autoxidation of 1-hexadecene (2.68 M) and PBD-BODIPY (10 μM) in PhCl initiated with dicumyl peroxide (1 mM) at 100 °C (black line) and inhibited by 2 μM of Ar2NO (blue line), TEMPO (red line) or Ar2NH (blue dashed line). Inset: expanded timescale showing the end of the inhibited periods for Ar2NO and Ar2NH. Reaction progress was monitored at 586 nm (ε = 119 166 M–1 cm–1). (B) Relevant steps for HOO˙ formation in a 1-hexadecene autoxidation along with the calculated transition state structure and activation parameters for the key 1,4-HAT reaction for comparison with corresponding processes in for styrene, cyclooctene and norbornene (Fig. 5B–D).
