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Spectroscopic and thermodynamic studies of complexation of some divalent metal ions with isatin- β -thiosemicarbazone
Konstantinović, S. S., Radovanović, B. C., Todorović, Z. B., Ilić, S. B. and Konstantinović, B. V. Spectroscopic and thermodynamic studies of complexation of some divalent metal ions with isatin- β -thiosemicarbazone Chemical Papers, Vol.61, No. 6, 2007, 485-489
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Author(s) |
Konstantinović, S. S.
Radovanović, B. C.
Todorović, Z. B.
Ilić, S. B.
Konstantinović, B. V.
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| Title |
Spectroscopic and thermodynamic studies of complexation of some divalent metal ions with isatin- β -thiosemicarbazone
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| Journal name |
Chemical Papers
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| Publication date |
2007
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| Year available |
2007
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| Volume number |
61
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| Issue number |
6
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| ISSN |
0366-6352
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| Start page |
485
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| End page |
489
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2007
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| Language |
english
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| Subject |
290000 Engineering and Technology
290600 Chemical Engineering
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| Abstract/Summary |
Metal complexes of some divalent metal ions (Co, Ni, Cu, Zn, Hg, and Pd) with isatin-β-thiosemicarbazone (ITS) as the Schiff base have been investigated potentiometrically and spectrophotometrically. The dissociation constants of the ligand and formation constants of the metal complexes, as well as the corresponding thermodynamic functions (ΔG, ΔH and ΔS) have been determined at different temperatures in ethanol—water solution. The full stability constants were also evaluated spectrophotometrically by the Job method. The experimental results indicate that Cu(II), Zn(II), Pd(II), and Hg(II) form one-to-one molecular complexes (ML) with the studied ligand, whereas Co(II) and Ni(II) form both ML and ML2 species.
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