| Titre : | Kinetics of the oxidation of tetracycline hydrate by copper(II) complexed with bipyridyl in alkaline medium using chloro - complex of palladium (II) as homogeneous catalyst (2012) |
| Auteurs : | Ashok Kumar Singh, Auteur ; Manjula Singh, Auteur ; Shahla Rahmani, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 16, Avril 2012) |
| Article en page(s) : | pp. 5728-573 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Homogeneous catalysis Oxidation Kinetics |
| Résumé : | The present paper deals with the kinetics and mechanism of Pd(II)-catalyzed oxidation of tetracycline hydrate by Cu(Bip)22+ in alkaline medium. First-order kinetics with respect to [tetracycline hydrate] and fractional positive order kinetics in [Cu(II)] and [Pd(II)] was observed. Nil effect of [OH-] and [bipyridyl] on the rate of oxidation was observed. Almost no effect of ionic strength as well as dielectric constant of the medium on the rate of oxidation was observed. The reaction was studied at four different temperatures and observed values of rate constants were utilized to calculate various activation parameters specially the entropy of activation (ΔS#). With the help of the observed kinetic orders with respect to the reactants involved in the reaction, spechophotometric evidence collected for the formation of reactive complexes and the positive entropy of activation, a most probable reaction mechanism for Pd(II)-catalyzed oxidation of tetracycline hydrate by Cu(Bip)22+ in alkaline medium has been proposed. |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=25834486 |
