(A) Plot of d[Cyclohexenone]/dt during the initial burst with respect to [Pd] shows a first order dependence, while (B) plot of d[Cyclohexenone]/dt during the post burst shows a second order dependence on [Pd] (The curve is a second order curve fit of rate = kobs[Pd]2). Reaction conditions: [cyclohexanone] = 100 mM (0.05 mmol), [2-Me2Npy] = 0.01 M (0.005 mmol), [TsOH] = 0.02 M (0.01 mmol), DMSO for VTotal of 0.5 mL, 1 atm O2, 80 °C. [Pd(TFA)2] = 0, 1.0, 2.5, 5.0, 7.5, 10.0 mM