European Journal of Chemistry

Solvatochromism and potentiometic studies of some active nitroso- and nitroso-azo- compounds



Main Article Content

Mamdouh Saad Masoud
Ekram Abd El-Moniem Khalil
Saeda Abou El-Thana Abou El Enein
Hesham Mostafa Kamel

Abstract

The stability studies of biologically active 2,4-dinitrosoresorcinol, o-carboxy phenylazo-dinitrosoresorcinol, N,N`-bis-[4,4`-(1,3-diphenyltriazine)]-diacetamide, 2-amino-6-phenylazo-pyridin-3-ol, 2-amino-3-hydroxy-pyridin-6-ylazo)-benzoic acid, 4-(2-amino-3-hydroxy-pyridin-6-ylazo)-benzoic acid ethyl ester and N-[4-(2-amino-3-hydroxy-pyridin-6-ylazo)-phenyl]-acetamide compounds were studied. The dissociation constants were determined potentiometrically. The thermodynamic parameters of dissociation were evaluated. Regression analysis is applied for correlating the different parameters. The results help to assign the solute-solvent interactions and the solvatochromic potential of the investigated compounds. The electronic character of the substituent and the chemical nature of the solvent are major factors for the observed solvatochromism.

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Masoud, M. S.; Khalil, E. A. E.-M.; El Enein, S. A. E.-T. A.; Kamel, H. M. Solvatochromism and Potentiometic Studies of Some Active Nitroso- and Nitroso-Azo- Compounds. Eur. J. Chem. 2011, 2, 420-432.

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