Aqueous Oxidation of 2,6-Dimethylphenol with Hydrogen Peroxide Catalyzed by Transition Metal Complexes Supported on Polyvinylpyridinium Salts

The oxidation of 2,6-dimethylphenol (2,6-DMP) was studied using H 2 O 2 as oxidant catalyzed by some transition metal-salphen complexes, supported on poly-vinylpyridinium salts in aqueous solutions. The major product was the diphenoquinone (DPQ). No reaction products were obtained when the reaction...

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Bibliographic Details
Published in:Journal of macromolecular science. Part A, Pure and applied chemistry Pure and applied chemistry, 2004-12, Vol.41 (2), p.107-114
Main Authors: El-Hamshary, Hany, Assubaie, Fahad N.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Oxidation
Phenols
Physicochemistry of polymers
Polymeric support
Polyvinylpyridinium salts
Properties and characterization
Salphen complexes
Special properties (catalyst, reagent or carrier)
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Summary:The oxidation of 2,6-dimethylphenol (2,6-DMP) was studied using H 2 O 2 as oxidant catalyzed by some transition metal-salphen complexes, supported on poly-vinylpyridinium salts in aqueous solutions. The major product was the diphenoquinone (DPQ). No reaction products were obtained when the reaction was carried out in the absence of polymers. The effects of reaction parameters such as the type of the polymeric support, concentration of H 2 O 2 , pH, and metal-catalyst were investigated in terms of percent conversion and product distribution of the starting materials. The methyl-poly-4-vinyl-pyridinium iodide (PVP-MeI) supported Mn-salphen was the most reactive catalyst system while the n-butyl-poly-4-vinyl-pyridinium bromide (PVP-BuBr) supported Cu-salphen was the most selective catalyst.
ISSN:1060-1325
1520-5738
DOI:10.1081/MA-120027297