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http://nopr.niscpr.res.in/handle/123456789/43970| Title: | Spectrophotometric study of acid-base equilibria of 4-(2-benzothiazolylazo)resorcinol and 4-(2-benzothiazolylazo)salicylic acid |
| Authors: | Abu-Bakr, Mohamed S El-Shahawy, Anwar S Ahmed, Seddique M |
| Issue Date: | Sep-1993 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The visible absorption spectra of 4-(2-benzothiazolylazo)resorcinol and 4-(2-benzothiazolylazo) salicyclic acid have been recorded in aquo-organic solvent mixtures in the pH range 0.5-12.0. The spectral changes have been explained in terms of shifts in equilibria amongst different molecular and ionic species of BTAR and BTAS existing in solution. The pKa values corresponding to the different ionisation steps have been determined at 25°C and 1=0.1 M (KNO3) by graphical analysis of the absorbance-pH curves. |
| Page(s): | 789-793 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.32A(09) [September 1993] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 32A(9) 789-793.pdf | 2.87 MB | Adobe PDF | View/Open |
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