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Kinetics and Mechanism of Reduction of 4(p-Dimethylamino)-Benzylidene-3-Methyl-1-Phenyl-2-Pyrazolin-5-one by Bisulphite Ions in Aqueous Ethanolic Media

M. M. Girgis ; Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt
R. M. Hassan ; Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt
Z. H. Khalil ; Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt

Puni tekst: engleski, pdf (3 MB) str. 687-695 preuzimanja: 89* citiraj
APA 6th Edition
Girgis, M.M., Hassan, R.M. i Khalil, Z.H. (1987). Kinetics and Mechanism of Reduction of 4(p-Dimethylamino)-Benzylidene-3-Methyl-1-Phenyl-2-Pyrazolin-5-one by Bisulphite Ions in Aqueous Ethanolic Media. Croatica Chemica Acta, 60 (4), 687-695. Preuzeto s https://hrcak.srce.hr/176395
MLA 8th Edition
Girgis, M. M., et al. "Kinetics and Mechanism of Reduction of 4(p-Dimethylamino)-Benzylidene-3-Methyl-1-Phenyl-2-Pyrazolin-5-one by Bisulphite Ions in Aqueous Ethanolic Media." Croatica Chemica Acta, vol. 60, br. 4, 1987, str. 687-695. https://hrcak.srce.hr/176395. Citirano 25.02.2021.
Chicago 17th Edition
Girgis, M. M., R. M. Hassan i Z. H. Khalil. "Kinetics and Mechanism of Reduction of 4(p-Dimethylamino)-Benzylidene-3-Methyl-1-Phenyl-2-Pyrazolin-5-one by Bisulphite Ions in Aqueous Ethanolic Media." Croatica Chemica Acta 60, br. 4 (1987): 687-695. https://hrcak.srce.hr/176395
Harvard
Girgis, M.M., Hassan, R.M., i Khalil, Z.H. (1987). 'Kinetics and Mechanism of Reduction of 4(p-Dimethylamino)-Benzylidene-3-Methyl-1-Phenyl-2-Pyrazolin-5-one by Bisulphite Ions in Aqueous Ethanolic Media', Croatica Chemica Acta, 60(4), str. 687-695. Preuzeto s: https://hrcak.srce.hr/176395 (Datum pristupa: 25.02.2021.)
Vancouver
Girgis MM, Hassan RM, Khalil ZH. Kinetics and Mechanism of Reduction of 4(p-Dimethylamino)-Benzylidene-3-Methyl-1-Phenyl-2-Pyrazolin-5-one by Bisulphite Ions in Aqueous Ethanolic Media. Croatica Chemica Acta [Internet]. 1987 [pristupljeno 25.02.2021.];60(4):687-695. Dostupno na: https://hrcak.srce.hr/176395
IEEE
M.M. Girgis, R.M. Hassan i Z.H. Khalil, "Kinetics and Mechanism of Reduction of 4(p-Dimethylamino)-Benzylidene-3-Methyl-1-Phenyl-2-Pyrazolin-5-one by Bisulphite Ions in Aqueous Ethanolic Media", Croatica Chemica Acta, vol.60, br. 4, str. 687-695, 1987. [Online]. Dostupno na: https://hrcak.srce.hr/176395. [Citirano: 25.02.2021.]

Sažetak
The kinetics of the title reduction studied in aqueous ethanolic
media spectrophotometrically. The effect of hydrogen ion concentration on the reduction rate was investigated in buffer solutions at constant ionic strength of 1.0. The reaction was found to be of the first order in both reactants and inverse first order with respect to the hydrogen ion. The rate of the reaction decreased with increasing ethanol as well as hydrogen ion concentrations. Pseudo-first-order rate constant, kob was obtained by monitoring the disappearance of the [dye]. Activation parameters have been evaluated and a tentative reaction mechanism was discussed.

Hrčak ID: 176395

URI
https://hrcak.srce.hr/176395

Posjeta: 165 *