Osmium(VIII) catalyzed oxidative cleavage of pyrrolidine ring in l-proline by hexacyanoferrate(III) in alkaline media / K. Sharanabasamma in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10381–10386 Titre : Osmium(VIII) catalyzed oxidative cleavage of pyrrolidine ring in l-proline by hexacyanoferrate(III) in alkaline media Type de document : texte imprimé Auteurs : K. Sharanabasamma, Auteur ; Mahantesh A. Angadi, Auteur ; Manjalee S. Salunke, Auteur Année de publication : 2010 Article en page(s) : pp. 10381–10386 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Osmium(VIII)--Catalyzed--Oxidative Cleavage--Pyrrolidine--Proline--Hexacyanoferrate(III)--Alkaline Media Résumé : Kinetics of oxidation of l-proline by hexacyanoferrate(III) catalyzed by osmium(VIII) in alkaline medium was studied at 30 °C. A mechanism involving free radical path was proposed. Rate law of the reaction was derived as The rate constant k and equilibrium constants K1 and K2 were evaluated as 3.79 × 103 dm3 mol−1 s−1, 0.52 dm3 mol−1, and 3.78 × 103 dm3 mol−1, respectively. The main reactive species of the catalyst appears to be OsO5(OH)3−. The oxidative product of l-proline was identified as l-glutamic acid which is different from the earlier reports. The literature reveals that 4-amino butyric acid, 4-amino butaraldehyde and keto acids were the oxidative products. Activation parameters were evaluated as Ea = 33.5 ± 2 kJ mol−1, ΔH⧧ = 31.0 ± 0.2 kJ mol−1, ΔS⧧ = −24 ± 1.5 J K−1 mol−1, ΔG⧧ = 38.0 ± 2 kJ mol−1. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901049p [article] Osmium(VIII) catalyzed oxidative cleavage of pyrrolidine ring in l-proline by hexacyanoferrate(III) in alkaline media [texte imprimé] / K. Sharanabasamma, Auteur ; Mahantesh A. Angadi, Auteur ; Manjalee S. Salunke, Auteur . - 2010 . - pp. 10381–10386. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10381–10386 Mots-clés : Osmium(VIII)--Catalyzed--Oxidative Cleavage--Pyrrolidine--Proline--Hexacyanoferrate(III)--Alkaline Media Résumé : Kinetics of oxidation of l-proline by hexacyanoferrate(III) catalyzed by osmium(VIII) in alkaline medium was studied at 30 °C. A mechanism involving free radical path was proposed. Rate law of the reaction was derived as The rate constant k and equilibrium constants K1 and K2 were evaluated as 3.79 × 103 dm3 mol−1 s−1, 0.52 dm3 mol−1, and 3.78 × 103 dm3 mol−1, respectively. The main reactive species of the catalyst appears to be OsO5(OH)3−. The oxidative product of l-proline was identified as l-glutamic acid which is different from the earlier reports. The literature reveals that 4-amino butyric acid, 4-amino butaraldehyde and keto acids were the oxidative products. Activation parameters were evaluated as Ea = 33.5 ± 2 kJ mol−1, ΔH⧧ = 31.0 ± 0.2 kJ mol−1, ΔS⧧ = −24 ± 1.5 J K−1 mol−1, ΔG⧧ = 38.0 ± 2 kJ mol−1. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901049p

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