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oai:ojs.www.eurjchem.com:article/407 2011-09-30T03:44:50Z eurjchem:REW driver

Solvatochromism and potentiometic studies of some active nitroso- and nitroso-azo- compounds Masoud, Mamdouh Saad Khalil, Ekram Abd El-Moniem El Enein, Saeda Abou El-Thana Abou Kamel, Hesham Mostafa Nitroso Pyridin-6-ylazo Triazene Effect of solvents Potentiometry Spectrophotometry 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. Atlanta Publishing House LLC 2011-09-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.eurjchem.com/index.php/eurjchem/article/view/407 10.5155/eurjchem.2.3.420-432.407 European Journal of Chemistry; Vol. 2 No. 3 (2011): September 2011; 420-432 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/407/PDF