Potentiometric and Thermodynamic Studies of Some Schiff-Base Derivatives of 4-Aminoantipyrine and Their Metal Complexes
Joint Authors
El-Sonbati, A. Z.
Diab, M. A.
Abd El-Kader, M. K.
El-Bindary, A. A.
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-11-12
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
The proton-ligand dissociation constant of 4-(4-amino-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-ylideneamino)-phenol (L1) and 4-(4-amino-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-ylideneamino)-benzoic acid (L2) and metal-ligand stability constants of their complexes with metal ions (Mn2+, Co2+, Ni2+, and Cu2+) have been determined potentiometrically in 0.1 mol·dm−3 KCl and 10% (by volume) ethanol-water mixture and at 298, 308, and 318 K.
The stability constants of the formed complexes increase in the order Mn2+, Co2+, Ni2+, and Cu2+.
The effect of temperature was studied, and the corresponding thermodynamic parameters (ΔG, ΔH, and ΔS) were derived and discussed.
The dissociation process is nonspontaneous, endothermic, and entropically unfavourable.
The formation of the metal complexes has been found to be spontaneous, endothermic, and entropically favourable.
American Psychological Association (APA)
El-Bindary, A. A.& El-Sonbati, A. Z.& Diab, M. A.& Abd El-Kader, M. K.. 2012. Potentiometric and Thermodynamic Studies of Some Schiff-Base Derivatives of 4-Aminoantipyrine and Their Metal Complexes. Journal of Chemistry،Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-490145
Modern Language Association (MLA)
El-Bindary, A. A.…[et al.]. Potentiometric and Thermodynamic Studies of Some Schiff-Base Derivatives of 4-Aminoantipyrine and Their Metal Complexes. Journal of Chemistry No. 2013 (2013), pp.1-6.
https://search.emarefa.net/detail/BIM-490145
American Medical Association (AMA)
El-Bindary, A. A.& El-Sonbati, A. Z.& Diab, M. A.& Abd El-Kader, M. K.. Potentiometric and Thermodynamic Studies of Some Schiff-Base Derivatives of 4-Aminoantipyrine and Their Metal Complexes. Journal of Chemistry. 2012. Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-490145
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-490145