Spectrophotometric evaluation of solvent effect on the stability constant of charge transfer complexes of FeIII with 5-sulphosalicylic acid and 5-chlorosalicylic acid

被引：0

作者：

Mani, Raj ^{[1
]}

Sanjay, Sharda S. ^{[1
]}

Chattopadhyaya, M. C. ^{[1
]}

机构：

[1] Univ Allahabad, Dept Chem, Allahabad 211002, Uttar Pradesh, India

来源：

JOURNAL OF THE INDIAN CHEMICAL SOCIETY | 2014年 / 91卷 / 01期

关键词：

Stability constant; molar absorptivity; 5-sulphosalicylic acid; 5-chlorosalicylic acid; charge transfer complex; 1,4-dioxane; EQUILIBRIUM-CONSTANTS; IRON(III);

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The charge transfer complex (CTC) formed by Fe-III with 5-sulphosalicylic acid 5-chlorosalicylic acid were studied using spectrophotometric method in mixed solvent system. Four solvent mixtures were taken having variation in amount of 1,4-dioxane as 5, 10, 15 and 20%. In acid range of pH 1-3, both the ligands formed 1 : 1 complex. A graphical method with computer software program was developed for determination of stability constant and molar absorptivity of 1 : 1 complex at pH 2.35 +/- 0.05 and ionic strength 0.1 M, maintained by NaClO4. This approach gave better value than obtained from graphical method neglecting certain terms to make a linear plot. It was observed that both the value of stability constant as well as molar absorptivity increases with increase in the percentage of 1,4-dioxane in the mixed Solvent.

引用

页码：133 / 136

页数：4

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