| DOI | Trouver le DOI : https://doi.org/10.1016/S0020-1693(00)89114-8 |
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| Auteur | Rechercher : Eaton, D. R.; Rechercher : Majid, A.; Rechercher : Tong, J. P. K. |
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| Format | Texte, Article |
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| Résumé | The kinetics of the reactions between p-nitro-benzaldehyde and p-toluidine and between acetone and p-anisidine have been examined in non-aqueous solutions and in the presence of Zinc(II) and Cobalt(II) complexes of thiourea which acts as catalysts. The reaction between 2,4-Dinitrophenyl acetate and p-toluidine is not catalysed by these metal complexes. The kinetics of the p-Nitrobenzaldehyde reaction are straight-forward with first order dependence on each of the reactants and on the catalyst and a second order rate determining step. For the reaction in acetonitrile d3 catalysed by tetrakis Zn(II) thiourea perchlorate a third order rate constant of 25.0±1.5 M−2 s−1 has been measured. The kinetics of the acetone/p-anisidine reaction are quite different and closely parallel similar reactions studied previously. The results for the two reactions cannot be fitted to a common mechanism. All three reactions involve nucleophilic attack of an aniline on a carbonyl group but two are catalysed by different mechanisms and the third is not catalysed at all. It is suggested that catalysis can occur either by coordination of the carbonyl compound or by coordination of the adduct formed by the carbonyl compound and the aniline. If neither of these reactants is capable of forming a sufficiently long lived metal complex there will be no catalysis. |
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| Date de publication | 1982-01 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Publication du CNRC | Cette publication n’est pas du CNRCCe sont des publications qui ont été rédigées par un auteur du CNRC, mais avant que celui-ci soit employé du CNRC. |
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| Numéro NPARC | 21270190 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 45ca1125-680f-4ecc-9823-6320ad22d6a1 |
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| Enregistrement créé | 2014-01-09 |
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| Enregistrement modifié | 2020-03-13 |
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