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Effect of Dielectric constants of Dioxane-Water mixtures on Proton-Ligand Dissociation constants (pK) and formation Constants of Cu (II) complexes with 1, 3-Diphenyl Thiazines pH-metrically at 0.1M ionic strength

Author Affiliations

  • 1Department of Chemistry, Vidya Bharati Mahavidyalaya, C. K. Naidu road, Camp, Amravati, MS, INDIA

Res.J.chem.sci., Volume 3, Issue (9), Pages 77-79, September,18 (2013)


The interactions between Cu(II) and nitro-phenyl thiazine(L), chlorodiphenyl-thiazine (L), chloro, 1,3.thiazine (L), 1,3 phenyl thiazine (L), and 1,3 diphenyl thiazine (L), have been investigated by pH-metric technique at 0.1M ionic strength and in different percentage of dioxone-water mixture with Cu(II)-1,3, diphenyl thiazine data obtained can be used to study the effect of dielectric constants on proton–ligand stability constant. It showed that Cu (II) forms 1:1 and 1:2 complexes with substituted thiazines. It could be also seen that pK and log k values are found to be increased with increasing the percentage of dioxane-water mixtures.


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