At moderate energies, the fastest reaction involving βRO 2 is βAlkoxyIsom. The rates of the alkoxy intermediate are given in Figure . The reverse reaction for βQOOH[O] reforming βRO 2 (βAlkoxyIsom) is favored at most energies and the β-βscissionFromAlkoxy is favored only at high energies. The strong reversibility of the alkoxy isomerization allows for other secondary pathways to contribute to product formation.