hrcak mascot   Srce   HID

Izvorni znanstveni članak

Kinetic Studies on Base-Catalyzed Condensation of BenzaIdehyde, p-Hydroxybenzaldehyde, p-Dimethylaminobenzaldehyde and N,N-Dimethyl-p-nitrosoaniline with l-Phenyl-3-methyl-2-pyrazolin-5-one

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. 215-223 preuzimanja: 187* citiraj
APA 6th Edition
Girgis, M.M., Hassan, R.M. i Khalil, Z.H. (1987). Kinetic Studies on Base-Catalyzed Condensation of BenzaIdehyde, p-Hydroxybenzaldehyde, p-Dimethylaminobenzaldehyde and N,N-Dimethyl-p-nitrosoaniline with l-Phenyl-3-methyl-2-pyrazolin-5-one. Croatica Chemica Acta, 60 (2), 215-223. Preuzeto s https://hrcak.srce.hr/176349
MLA 8th Edition
Girgis, M. M., et al. "Kinetic Studies on Base-Catalyzed Condensation of BenzaIdehyde, p-Hydroxybenzaldehyde, p-Dimethylaminobenzaldehyde and N,N-Dimethyl-p-nitrosoaniline with l-Phenyl-3-methyl-2-pyrazolin-5-one." Croatica Chemica Acta, vol. 60, br. 2, 1987, str. 215-223. https://hrcak.srce.hr/176349. Citirano 25.02.2021.
Chicago 17th Edition
Girgis, M. M., R. M. Hassan i Z. H. Khalil. "Kinetic Studies on Base-Catalyzed Condensation of BenzaIdehyde, p-Hydroxybenzaldehyde, p-Dimethylaminobenzaldehyde and N,N-Dimethyl-p-nitrosoaniline with l-Phenyl-3-methyl-2-pyrazolin-5-one." Croatica Chemica Acta 60, br. 2 (1987): 215-223. https://hrcak.srce.hr/176349
Harvard
Girgis, M.M., Hassan, R.M., i Khalil, Z.H. (1987). 'Kinetic Studies on Base-Catalyzed Condensation of BenzaIdehyde, p-Hydroxybenzaldehyde, p-Dimethylaminobenzaldehyde and N,N-Dimethyl-p-nitrosoaniline with l-Phenyl-3-methyl-2-pyrazolin-5-one', Croatica Chemica Acta, 60(2), str. 215-223. Preuzeto s: https://hrcak.srce.hr/176349 (Datum pristupa: 25.02.2021.)
Vancouver
Girgis MM, Hassan RM, Khalil ZH. Kinetic Studies on Base-Catalyzed Condensation of BenzaIdehyde, p-Hydroxybenzaldehyde, p-Dimethylaminobenzaldehyde and N,N-Dimethyl-p-nitrosoaniline with l-Phenyl-3-methyl-2-pyrazolin-5-one. Croatica Chemica Acta [Internet]. 1987 [pristupljeno 25.02.2021.];60(2):215-223. Dostupno na: https://hrcak.srce.hr/176349
IEEE
M.M. Girgis, R.M. Hassan i Z.H. Khalil, "Kinetic Studies on Base-Catalyzed Condensation of BenzaIdehyde, p-Hydroxybenzaldehyde, p-Dimethylaminobenzaldehyde and N,N-Dimethyl-p-nitrosoaniline with l-Phenyl-3-methyl-2-pyrazolin-5-one", Croatica Chemica Acta, vol.60, br. 2, str. 215-223, 1987. [Online]. Dostupno na: https://hrcak.srce.hr/176349. [Citirano: 25.02.2021.]

Sažetak
The condensation reaction of 1-phenyl-3-methyl-2-pyrazolin-5-one (I) with benzaidehyde (II), p-hydroxybenzaldehyde (III),
p-dimethylaminobenzaldehyde (IV) and N,N-dimethyl-p-nitrosoaniline
(V) in ethanolic media containing piperidine as base catalyst was investigated spectrophotometrically at 10-50oC. It was found that these reactions followed over-all second-order kinetics, first-order with respect to each of the reactants. The results suggest that the rate determining step involves the dehydration of the aldol intermediate (XII). From the dependence of the rate constants on temperature, the thermodynamic parameters of activation were determined and the mechanism which is consistent with the obtained data is discussed.

Hrčak ID: 176349

URI
https://hrcak.srce.hr/176349

Posjeta: 260 *