Determination of relative Autoxidation Rates of Simple Alkylaromatic Hydrocarbons by competitive reactions

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Abstract
Relative rates of oxidative attack at the CH bonds in α‐position to the aromatic nucleus were determined for 10 simple alkylaromatic hydrocarbons. The results obtained by competitive oxidations of binary mixtures were shown to be consistent. From these results and the regioselectivity data already published, relative reactivities referring to the tertiary CH bond of cumene were calculated for all CH bonds of the hydrocarbons studied.As expected, p‐alkyl groups increase the reactivity of CH bonds in α‐position to the aromatic nucleus. On the other hand, large alkyl groups, bound to the α‐C atoms, decrease the reactivity of the α‐CH bonds.