Catalysis and Mechanistic Studies of Ru(III), Os(VIII), Pd(II), and Pt(IV) Metal Ions on Oxidative Conversion of Folic Acid
The homogeneous catalysis of Ru(III), Os(VIII), Pd(II), and Pt(IV) in the oxidative conversion of folic acid (FA) to pterin-6-carboxylic acid, p-aminobenzoic acid, and glutamic acid by sodium N-bromo-p-toluenesulfonamide (bromamine-T; BAT) was studied in alkaline medium. The detailed kinetic and mec...
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| Veröffentlicht in: | Industrial & engineering chemistry research 2010-02, Vol.49 (4), p.1550-1560 |
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| creator | Kumar, C. H. Vinod Jagadeesh, R. V Shivananda, K. N Sandhya, Y. Sree Raju, C. Naga |
| description | The homogeneous catalysis of Ru(III), Os(VIII), Pd(II), and Pt(IV) in the oxidative conversion of folic acid (FA) to pterin-6-carboxylic acid, p-aminobenzoic acid, and glutamic acid by sodium N-bromo-p-toluenesulfonamide (bromamine-T; BAT) was studied in alkaline medium. The detailed kinetic and mechanistic investigations of all four catalyzed oxidation reactions were studied at 313 K. The stoichiometries and oxidation products of the four catalyzed reactions were found to be the same, but their kinetic patterns and oxidation mechanisms were different. The reactions were studied at different temperatures, and the activation parameters were evaluated for each catalyzed reaction. Under identical sets of experimental conditions, the kinetics of all four catalyzed reactions were compared with those of uncatalyzed reactions, revealing that the catalyzed reactions are 6−22 times faster. The catalytic efficiency of these catalysts follows the order Os(VIII) > Ru(III) > Pt(IV) > Pd(II). This trend can be attributed to the different d electronic configuration of the catalysts. Based on the observed experimental results, a detailed mechanistic interpretation and the related kinetic model were derived for each catalyst. |
| doi_str_mv | 10.1021/ie900340k |
| format | Article |
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H. Vinod ; Jagadeesh, R. V ; Shivananda, K. N ; Sandhya, Y. Sree ; Raju, C. Naga</creator><creatorcontrib>Kumar, C. H. Vinod ; Jagadeesh, R. V ; Shivananda, K. N ; Sandhya, Y. Sree ; Raju, C. Naga</creatorcontrib><description>The homogeneous catalysis of Ru(III), Os(VIII), Pd(II), and Pt(IV) in the oxidative conversion of folic acid (FA) to pterin-6-carboxylic acid, p-aminobenzoic acid, and glutamic acid by sodium N-bromo-p-toluenesulfonamide (bromamine-T; BAT) was studied in alkaline medium. The detailed kinetic and mechanistic investigations of all four catalyzed oxidation reactions were studied at 313 K. The stoichiometries and oxidation products of the four catalyzed reactions were found to be the same, but their kinetic patterns and oxidation mechanisms were different. The reactions were studied at different temperatures, and the activation parameters were evaluated for each catalyzed reaction. Under identical sets of experimental conditions, the kinetics of all four catalyzed reactions were compared with those of uncatalyzed reactions, revealing that the catalyzed reactions are 6−22 times faster. The catalytic efficiency of these catalysts follows the order Os(VIII) > Ru(III) > Pt(IV) > Pd(II). This trend can be attributed to the different d electronic configuration of the catalysts. Based on the observed experimental results, a detailed mechanistic interpretation and the related kinetic model were derived for each catalyst.</description><identifier>ISSN: 0888-5885</identifier><identifier>EISSN: 1520-5045</identifier><identifier>DOI: 10.1021/ie900340k</identifier><identifier>CODEN: IECRED</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Catalysis ; Catalytic reactions ; Chemical engineering ; Chemistry ; Exact sciences and technology ; General and physical chemistry ; Kinetics, Catalysis, and Reaction Engineering ; Reactors ; Theory of reactions, general kinetics. Catalysis. 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H. Vinod</creatorcontrib><creatorcontrib>Jagadeesh, R. V</creatorcontrib><creatorcontrib>Shivananda, K. N</creatorcontrib><creatorcontrib>Sandhya, Y. Sree</creatorcontrib><creatorcontrib>Raju, C. Naga</creatorcontrib><title>Catalysis and Mechanistic Studies of Ru(III), Os(VIII), Pd(II), and Pt(IV) Metal Ions on Oxidative Conversion of Folic Acid</title><title>Industrial & engineering chemistry research</title><addtitle>Ind. Eng. Chem. Res</addtitle><description>The homogeneous catalysis of Ru(III), Os(VIII), Pd(II), and Pt(IV) in the oxidative conversion of folic acid (FA) to pterin-6-carboxylic acid, p-aminobenzoic acid, and glutamic acid by sodium N-bromo-p-toluenesulfonamide (bromamine-T; BAT) was studied in alkaline medium. The detailed kinetic and mechanistic investigations of all four catalyzed oxidation reactions were studied at 313 K. The stoichiometries and oxidation products of the four catalyzed reactions were found to be the same, but their kinetic patterns and oxidation mechanisms were different. The reactions were studied at different temperatures, and the activation parameters were evaluated for each catalyzed reaction. Under identical sets of experimental conditions, the kinetics of all four catalyzed reactions were compared with those of uncatalyzed reactions, revealing that the catalyzed reactions are 6−22 times faster. The catalytic efficiency of these catalysts follows the order Os(VIII) > Ru(III) > Pt(IV) > Pd(II). This trend can be attributed to the different d electronic configuration of the catalysts. Based on the observed experimental results, a detailed mechanistic interpretation and the related kinetic model were derived for each catalyst.</description><subject>Applied sciences</subject><subject>Catalysis</subject><subject>Catalytic reactions</subject><subject>Chemical engineering</subject><subject>Chemistry</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Kinetics, Catalysis, and Reaction Engineering</subject><subject>Reactors</subject><subject>Theory of reactions, general kinetics. Catalysis. 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Res</addtitle><date>2010-02-17</date><risdate>2010</risdate><volume>49</volume><issue>4</issue><spage>1550</spage><epage>1560</epage><pages>1550-1560</pages><issn>0888-5885</issn><eissn>1520-5045</eissn><coden>IECRED</coden><abstract>The homogeneous catalysis of Ru(III), Os(VIII), Pd(II), and Pt(IV) in the oxidative conversion of folic acid (FA) to pterin-6-carboxylic acid, p-aminobenzoic acid, and glutamic acid by sodium N-bromo-p-toluenesulfonamide (bromamine-T; BAT) was studied in alkaline medium. The detailed kinetic and mechanistic investigations of all four catalyzed oxidation reactions were studied at 313 K. The stoichiometries and oxidation products of the four catalyzed reactions were found to be the same, but their kinetic patterns and oxidation mechanisms were different. The reactions were studied at different temperatures, and the activation parameters were evaluated for each catalyzed reaction. Under identical sets of experimental conditions, the kinetics of all four catalyzed reactions were compared with those of uncatalyzed reactions, revealing that the catalyzed reactions are 6−22 times faster. The catalytic efficiency of these catalysts follows the order Os(VIII) > Ru(III) > Pt(IV) > Pd(II). This trend can be attributed to the different d electronic configuration of the catalysts. Based on the observed experimental results, a detailed mechanistic interpretation and the related kinetic model were derived for each catalyst.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><doi>10.1021/ie900340k</doi><tpages>11</tpages></addata></record> |
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| subjects | Applied sciences Catalysis Catalytic reactions Chemical engineering Chemistry Exact sciences and technology General and physical chemistry Kinetics, Catalysis, and Reaction Engineering Reactors Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry |
| title | Catalysis and Mechanistic Studies of Ru(III), Os(VIII), Pd(II), and Pt(IV) Metal Ions on Oxidative Conversion of Folic Acid |
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