EFFECT OF SUBSTITUENTS ON THE ABSORPTION-SPECTRA AND PK VALUES OF SOME AZO DYES DERIVED FROM THIOBARBITURIC ACID

Authors
KUANAR M MISHRA BK
Citation
M. Kuanar et Bk. Mishra, EFFECT OF SUBSTITUENTS ON THE ABSORPTION-SPECTRA AND PK VALUES OF SOME AZO DYES DERIVED FROM THIOBARBITURIC ACID, Proceedings of the Indian Academy of Sciences. Chemical sciences, 108(5), 1996, pp. 451-458
Citations number
19
Categorie Soggetti
Chemistry
Journal title
Proceedings of the Indian Academy of Sciences. Chemical sciences → ACNP
ISSN journal
02534134
Volume
108
Issue
5
Year of publication
1996
Pages
451 - 458
Database
ISI
SICI code
0253-4134(1996)108:5<451:EOSOTA>2.0.ZU;2-Y
Abstract
A series of azo dyes from aromatic diazonium salts and thiobarbituric acid have been synthesised and their UV-Vis spectra have been recorded in neutral media and at two extreme pH values. The absorption maxima have been correlated with Swain-Lupton's F and R parameters using Will iams-Norrington's weightage factors. The pK values of the dyes have al so been determined and are highly predictable using Williams-Norringto n's model.