“…Alternatively, the diarylnitroxide may catalyse the cross-dismutation of alkylperoxyl and hydroperoxyl radicals (Figure 1C); the latter arising from addition reactions in autoxidations of unsaturated substrates. 7 The sulfur-and oxygen-bridged diarylamines phenothiazine (PTZ) and phenoxazine (PNX) are among the most reactive RTAs known, with rate constants for reactions with peroxyl radicals of 7.6 10 6 and 3.910 7 M -1 s -1 , respectively, at 37C -roughly 40-and 200-fold greater than ADPAs, respectively (∼210 5 M -1 s -1 under the same conditions). [8][9][10] However, PTZ, PNX and their derivatives are not commonly used to protect hydrocarbon products from autoxidation.…”