Fig. 4. Assessing rates of PCy₃ loss from the decomposition of s-GIIm and u-GIIm in C₆D₆. Left: Rate curves at 60 °C. Right: Initial rate constants and k_rel (normalized to u-GIIm) at 40 °C, 60 °C, and 80 °C. For half-lives and rate plots at other temperatures, see the ESI.† .