Monatshefte für Chemie / Chemical Monthly

, Volume 122, Issue 1–2, pp 17–20 | Cite as

A thermodynamic study of La(III)L-alanine complexes

  • F. M. Elzawawy
Anorganische Und Physikalische Chemie


The protonation constants ofL-alanine and the complex formation constants of its La(III) complexes were determined by potentiometric studies at ionic strengths 0.06, 0.1, and 0.15 mol dm−3 (NaClO4) and at different temperatures 20, 27, and 35 °C. The data together with the derived thermodynamic parameters ΔH°, ΔS°, and ΔG° are reported and discussed.


Lanthanum complexes L-Alanine Potentiometry Thermodynamic parameters 

Eine thermodynamische Untersuchung der La(III)-L-Alanin-Komplexe


Die Protonierungskonstanten vonL-Alanin und die Komplexbildungskonstanten der La(III)-Komplexe wurden potentiometrisch bei den Ionenstärken 0.06, 0.1 und 0.15 mol dm−3 (NaClO4) bei den Temperaturen 20, 27 und 35 °C bestimmt. Diese Daten und die abgeleiteten thermodynamischen Parameter ΔH °, ΔS ° und ΔG ° werden diskutiert.


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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • F. M. Elzawawy
    • 1
  1. 1.Department of Chemistry, Faculty of ScienceAin Shams UniversityCairoEgypt

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