The products of a stabilized βRO 2 look quite different than for the entrance channel due to lower available energy. For example, epoxides only form in substantial amounts at low temperatures and when βRO 2 is stabilized. While epoxides have not been observed in isobutanol oxidation, most studies have focused mostly on temperatures higher than 500 K. At temperatures between 500 and 1000 K and pressures above 10 5 Pa, Figure shows that βR + O 2 primarily forms stabilized βRO 2 , and stabilized βRO 2 primarily forms βR + O 2 , indicating a partial equilibrium between βR + O 2 and βRO 2 . Under these conditions, the secondary products, not explicitly shown in Figure , would be the dominant net pathways. At lower temperatures, the calculations in this work suggest that the dominant secondary products are trisub_epoxy and OH at low temperatures and acetone, CH 2 O, and OH at higher temperatures.