The products from the liquid phase, non-catalytic oxidations of 2, a-dimethylpeiitane (I), 2, klimethylpentane (II), 2.5-tliniethylhexane (111) and 2.6-dimethylheptane (IV) have been identified and related to one facet of the mechanism of hydrocarbon oxidation. In the cases of I1 and 111, the 2, 4-and 3, j-dihydroperoxides, respectively, were made in extraordinarily high yields despite the fact that less than 10% of the hydrocarbons reacted. The results ...