Titanium tetra-tert-butoxide-tert-butyl hydroperoxide oxidizing system: Physicochemical and chemical aspects

Peroxide intermediates of oxidation processes: Organic trioxides

“…For example, the yield of 1 O 2 formed upon decomposition of 7 is 45% (9,10-DMA, 20 • C, benzene) 215 . It should be noted, however, that direct oxidation of the acceptor with trioxide is possible in this type of experiment, resulting in an overestimated quantum yield of 1 O 2 .…”

“…Formation of molecular products upon decomposition of (t-BuO) 3 TiOOOBu-t in the presence of sterically hindered phenols (20 • C, benzene). The product yields refer to 1 mol of trioxide 7 anisotropic ESR signal of (t-BuO) 3 TiOO • with g 1 = 2.0249, g 2 = 2.0092, and g 3 = 2.0025 appears 215 . In the presence of MNP and PBN spin traps, spin adducts of the alkoxy radicals are formed; both types of ROO • radicals were identified as adducts with PBN 213 -215 .…”

Interaction of 9-substituted anthracenes with oxidation systems tert-butylhydroperoxide-metal tert-butoxide

“…Interaction of tert-butylhydroperoxide I with tertbutoxides of aluminum, titanium, zirconium, vanadium, chromium includes the stages of formation of metal-containing peroxides and trioxides [1][2][3][4][5][6]. The main product of decomposition of the latters is oxygen, partly in the singlet state.…”

“…Derivatives of this type were obtained in the reactions of radicals ROO • with some aromatic amines [7] and sterically hindered phenols [2,[8][9][10]. The reaction of hydroperoxide I with 9,10-dimethylanthracene in the presence of alkoxyderivatives of transition metals (acetylacetonates of cobalt, chromium, vanadium, tetra-tert-butoxychromium) is described [6,11].…”

“…The products of the reaction of the oxidation systems with the methyl group of 9-MA (9-anthraldehyde and 9-anthroic acid) were absent [Eq. (2)]. …”