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- Title
Kinetics and Mechanism of 2,3,6-Trimethylphenol Oxidation by Hydrogen Peroxide in the Presence of TiO<sub>2</sub>–SiO<sub>2</sub> Aerogel.
- Authors
Trukhan, N. N.; Kholdeeva, O. A.
- Abstract
The product and kinetics studies of 2,3,6-trimethylphenol (TMP) oxidation by 30% aqueous Н2О2 in the presence of a heterogeneous catalyst, TiO2–SiO2 aerogel, are performed in an MeCN medium. The main reaction products are 2,3,5-trimethyl-1,4-benzoquinone and 2,2",3,3",6,6"-hexamethyl-4,4"-biphenol. The reaction is first-order in Н2О2 and fractional order (1–0) in TMP. The reaction rate is proportional to the catalyst amount and depends on the water concentration in the reaction mixture in a complex manner. The results suggest the formation of an active intermediate on the titanium center. In this intermediate containing both a TMP molecule and the hydroperoxide group, inner-sphere one-electron oxidation of TMP occurs to give the phenoxyl radical.
- Subjects
OXIDATION; HYDROGEN peroxide; TITANIUM dioxide; SILICA; CHEMICAL reactions; RADICALS (Chemistry)
- Publication
Kinetics & Catalysis, 2003, Vol 44, Issue 3, p347
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1023/A:1024442901917