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Thermogravimetric and spectroscopic studies on La(III) and Ce(III) complexes with some thio-schiff bases

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Abstract

Solid complexes of five derivatives of thio-Schiff bases with La(III) and Ce(III) ions were prepared and characterized by elemental and thermogravimetric analyses. The suggested general formula of the solid complexes is [ML2(H2O)X]·2H2O, whereM=trivalent lanthanide ion,L=Schiff base andX=Cl− or ClO −4 . Information about the water of hydration, the coordinated water molecules, the coordination chemistry and the thermal stability of these complexes was obtained and is discussed. Additionally, a general scheme of thermal decomposition of the lanthanide-Schiff base complexes is proposed.

Zusammenfassung

Feststoffkomplexe von fünf Derivaten von Thioschiff'schen Basen mit La(III)- und Ce(III)-Ionen wurden hergestellt und mittels Elementaranalyse und TG charakterisiert. Die vorgeschlagene Formel der Feststoffkomplexe lautet [ML2(H2O)x]2H2O mitM=dreibindiges Lanthanidenion,L=Schiff'sche Base undX=Cl−-oder ClO −4 -Ion. Informationen über das Hydratwasser, die koordinierten Wassermoleküle, die Koordinationschemie und die thermische Stabilität dieser Komplexe wurde ermittelt und diskutiert. Außerdem wurde ein allgemeines Schema für die thermische Zersetzung der Lanthaniden-Schiff'schen Basen vorgeschlagen.

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Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Cairo University, Cairo, Egypt

    Y. M. Issa, H. M. Abdel Fattah & A. A. Soliman

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  1. Y. M. Issa
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  2. H. M. Abdel Fattah
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  3. A. A. Soliman
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Issa, Y.M., Fattah, H.M.A. & Soliman, A.A. Thermogravimetric and spectroscopic studies on La(III) and Ce(III) complexes with some thio-schiff bases. Journal of Thermal Analysis 42, 1175–1184 (1994). https://doi.org/10.1007/BF02546927

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  • DOI: https://doi.org/10.1007/BF02546927

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