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A comparative solvent extraction study of manganese(II) with 8-Mercaptoquinoline, 8-Quinolinol and its analogues

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Abstract

Equilibrium distribution coefficients were determined for the extraction of manganese(II) with 8-mercaptoquinoline, 8-quinolinol and its 2-methyl, 4-methyl, 5-chloro and 5-nitro analogues as a function of pH and reagent concentration at ambient temperature. 8-Mercaptoquinoline forms a mono self-adduct with Mn(II) whereas simple 1∶2 chelate formation was observed in the case of 8-quinolines. The adduct formation constant and the overall formations constants in the aqueous phase have been determined. A linear relationship was observed between the equilibrium constants, formation constants and the pK values of the chelating agents.

Synergic enhancement was observed in the extraction of Mn(II) with 8-mercaptoquinoline in presence of pyridine and its methyl derivatives and the adduct formation constants of the 1∶2, chelate to nitrogen base, adducts were evaluated.

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Authors and Affiliations

  1. Tata Institute of Fundamental Research, 400005, Bombay, India

    Arvind T. Rane & Deepawati R. Nepali

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  1. Arvind T. Rane
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  2. Deepawati R. Nepali
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Rane, A.T., Nepali, D.R. A comparative solvent extraction study of manganese(II) with 8-Mercaptoquinoline, 8-Quinolinol and its analogues. Mikrochim Acta 90, 27–42 (1986). https://doi.org/10.1007/BF01196818

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  • DOI: https://doi.org/10.1007/BF01196818

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