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Original scientific paper

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

Fulltext: english, pdf (3 MB) pages 215-223 downloads: 200* cite
APA 6th Edition
Girgis, M.M., Hassan, R.M. & 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. Retrieved from 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, no. 2, 1987, pp. 215-223. https://hrcak.srce.hr/176349. Accessed 19 Apr. 2021.
Chicago 17th Edition
Girgis, M. M., R. M. Hassan and 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, no. 2 (1987): 215-223. https://hrcak.srce.hr/176349
Harvard
Girgis, M.M., Hassan, R.M., and 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), pp. 215-223. Available at: https://hrcak.srce.hr/176349 (Accessed 19 April 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 [cited 2021 April 19];60(2):215-223. Available from: https://hrcak.srce.hr/176349
IEEE
M.M. Girgis, R.M. Hassan and 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, no. 2, pp. 215-223, 1987. [Online]. Available: https://hrcak.srce.hr/176349. [Accessed: 19 April 2021]

Abstracts
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

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