title: Studies of the reactivity of trolox with Mn3+/Fe3+ complexes by pulse radiolysis.
abstract: The rates and mechanisms for the reactions between Trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid), a synthetic analogue of alpha-tocopherol, Br2- and Mn3+-phosphate were determined under aerobic and anaerobic conditions by fast kinetic methods. In addition, the reaction between Fe(OH)2+ and Trolox at pH 6.0 was shown not to occur under the conditions of the experiment, leading to a limiting rate for that reaction of k less than 10(3) M-1 s-1. These results are compared to studies of the reactivity of Trolox with HO2/O2- and are discussed in light of the known antioxidant properties of vitamin E.
mesh_terms: D001578:Benzopyrans; D001966:Bromine; D002839:Chromans; D005609:Free Radicals; D007501:Iron; D008345:Manganese; D010545:Peroxides; D011675:Pulse Radiolysis; D013481:Superoxides
chemical_list: D001578:Benzopyrans; D002839:Chromans; D005609:Free Radicals; D010545:Peroxides; D013481:Superoxides; C049375:perhydroxyl radical; D008345:Manganese; D007501:Iron; C010643:6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid; D001966:Bromine