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Electrochemical studies on the composition, stabilities and thermodynamics of Zn+2, Cd+2 and Pb+2 complexes with methylene bis thio acetic acid

Elektrochemische Untersuchungen über Zusammensetzung, Stabilität und Thermodynamik von Zn(II)-, Cd(II)- und Pb(II)-Komplexen mit Methylen-bisthioessigsäure

  • Anorganische Und Physikalische Chemie
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Abstract

Potentiometric and conductometric studies on the zinc, cadmium, lead—methylene bis thio acetic acid system in aqueous media reveal the formation of 1:1 and 1:2 (M:L) complexes in thepH range 3.4–5.1. Their stability constants have been determined at 20°, 30° and 40 °C by applyingCalvin andMelchior's extension ofBjerrum's method. The overall changes in thermodynamic function ΔH, ΔG and ΔS accompanying complexation have been evaluated at 30 °C.

Zusammenfassung

Potentiometrische und konduktometrische Untersuchungen an Zink-, Cadmium- und Blei-Methylen-bis-thioessigsäure-Systemen in wäßrigem Medium zeigten die Bildung von 1:1 und 1:2 (M:L)-Komplexen impH-Bereich 3,4–5,1. Die Stabilitätskonstanten wurden bei 20°, 30° und 40 °C mittels derCalvin-Melchior-Methode (erweiterteBjerrum-Methode) bestimmt. Die thermodynamischen Parameter ΔH, ΔG und ΔS der Komplexierung wurden für 30 °C ermittelt.

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Authors and Affiliations

  1. Department of Chemistry, Malaviya Regional Engineering College, 302017, Jaipur, India

    R. S. Saxena, Reshma D. Parikh & K. C. Gupta

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  1. R. S. Saxena
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  2. Reshma D. Parikh
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  3. K. C. Gupta
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Saxena, R.S., Parikh, R.D. & Gupta, K.C. Electrochemical studies on the composition, stabilities and thermodynamics of Zn+2, Cd+2 and Pb+2 complexes with methylene bis thio acetic acid. Monatsh Chem 115, 141–146 (1984). https://doi.org/10.1007/BF00798404

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  • DOI: https://doi.org/10.1007/BF00798404

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