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Hydrogen atom transfer (HAT) and sequential proton-loss electron transfer (SPLET) mechanisms. Both mechanisms are competitive with each other, and although the rate constant for the electron transfer in SPLET is much higher than the rate constant for hydrogen transfer in HAT, even small amounts of phenoxide anions ArO− can make the SPLET to dominate over HAT [41]. ArOH: antioxidant, LOO•: peroxyl radical, S: solvent.
