Universal Journal of Chemistry(CEASE PUBLICATION) Vol. 1(1), pp. 7 - 10
DOI: 10.13189/ujc.2013.010102
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Studies Thermodynamical Stability of Complexes of Rare Earth Metal Ions with Substituted Pyrazole

A. B. Naik^1,*, M. L. Narwade^2
1 Physical Chemistry laboratory, Department of Chemical Technology, SGB Amravati University, Amravati-444602 (MS) India
² Department of Chemistry, Vidyabharati Mahavidyalaya, Amravati-444602 (MS) India

ABSTRACT

The stability constants of 1-phenyl-3-(2-hydroxy-4-methylphenyl)-5-methylpyrazole (PHMPMPz) and their complexes with Pr (III) and Sm (III) metal ions have been determined in 70% v/v dioxane-water media at different ionic strength (0.02, 0.04, 0.06, 0.08, 0.1) mol.dm-3 at 300.15K by pH metry method. The pK and logK values decrease with increase in ionic strength of medium, which indicated the opposite charges on reacting species. The values of stability constants for Sm (III) were greater than Pr (III) metal ion. The thermodynamic stability constants at zero ionic strength have also been determined.

KEYWORDS
Pyrazole, ionic strength, stability constant, pH

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] A. B. Naik , M. L. Narwade , "Studies Thermodynamical Stability of Complexes of Rare Earth Metal Ions with Substituted Pyrazole," Universal Journal of Chemistry(CEASE PUBLICATION), Vol. 1, No. 1, pp. 7 - 10, 2013. DOI: 10.13189/ujc.2013.010102.

(b). APA Format:
A. B. Naik , M. L. Narwade (2013). Studies Thermodynamical Stability of Complexes of Rare Earth Metal Ions with Substituted Pyrazole. Universal Journal of Chemistry(CEASE PUBLICATION), 1(1), 7 - 10. DOI: 10.13189/ujc.2013.010102.