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Potentiometric and Thermodynamic Studies of Azosulfonamide Drugs. X
El-Bindary, A. A., El-Sonbati, A. Z., El-Mosalamy, E. H. and Ahmed, R. M. Potentiometric and Thermodynamic Studies of Azosulfonamide Drugs. X Chemical Papers, Vol.57, No. 4, 2003, 255-258
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Attached Files |
| Name |
Description |
MIMEType |
Size |
Downloads |
n574a255.pdf
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574a255.pdf |
application/pdf |
114.66KB |
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| Author(s) |
El-Bindary, A. A.
El-Sonbati, A. Z.
El-Mosalamy, E. H.
Ahmed, R. M.
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| Title |
Potentiometric and Thermodynamic Studies of Azosulfonamide Drugs. X
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| Journal name |
Chemical Papers
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| Publication date |
2003
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| Year available |
2003
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| Volume number |
57
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| Issue number |
4
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| ISSN |
0366-6352
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| Start page |
255
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| End page |
258
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2003
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| Language |
english
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| Subject |
290000 Engineering and Technology
290600 Chemical Engineering
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| Abstract/Summary |
Dissociation constants of azosulfonamide derivatives of rhodanine have been determined potentiometrically in 0.1 M-KCl and 30 vol. % ethanol—water mixture. The data are discussed in terms of the electron nature of the substituents and of the change in temperature. The pK1H values have been found to increase with increasing electron-donating nature of the substituents. The evaluated thermodynamic parameters (ΔG, ΔH, and ΔS) indicated that the dissociation processes are not spontaneous, they are endothermic and entropically unfavourable.
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