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Kinetics and mechanism of oxidation of l - proline by N - bromosuccinimide in aqueous acidic medium / Alaa Eldin Mokhtar Abdel-Hady in Industrial & engineering chemistry research, Vol. 50 N° 22 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12421-12425 Titre : Kinetics and mechanism of oxidation of l - proline by N - bromosuccinimide in aqueous acidic medium Type de document : texte imprimé Auteurs : Alaa Eldin Mokhtar Abdel-Hady, Auteur Année de publication : 2012 Article en page(s) : pp. 12421-12425 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Oxidation  Kinetics Résumé : Kinetics of oxidation of L-poline by N-bromosuccinimide (NBS) in aqueous acidic medium and water-alcohol solvent mixtures were performed. The reaction was first order dependent on both [proline] and [NBS]. The rate of reaction was inversely dependent upon [H+] through the pH range 2.6-3.3 and varied with the cosolvent according to the order MeOH > EtOH. The conjugate base of amino acid was considered as the main reactive species. An inner-sphere mechanism in which the conjugate base of amino acid was attached by NBS to form the precursor intermediate complex was proposed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745714 [article] Kinetics and mechanism of oxidation of l - proline by N - bromosuccinimide in aqueous acidic medium [texte imprimé] / Alaa Eldin Mokhtar Abdel-Hady, Auteur . - 2012 . - pp. 12421-12425. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12421-12425 Mots-clés : Oxidation  Kinetics Résumé : Kinetics of oxidation of L-poline by N-bromosuccinimide (NBS) in aqueous acidic medium and water-alcohol solvent mixtures were performed. The reaction was first order dependent on both [proline] and [NBS]. The rate of reaction was inversely dependent upon [H+] through the pH range 2.6-3.3 and varied with the cosolvent according to the order MeOH > EtOH. The conjugate base of amino acid was considered as the main reactive species. An inner-sphere mechanism in which the conjugate base of amino acid was attached by NBS to form the precursor intermediate complex was proposed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745714