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Mischligandenkomplexe einiger Seltener Erden

Mixed ligand complexes of some of the rare earths. La(III)-, Pr(III)- or Nd(III)-CDTA-Hydroxy acids

La(III)-, Pr(III)- oder Nd(III)-CDTA-Hydroxysäuren

  • Anorganische, Struktur- und Physikalische Chemie
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Abstract

Biligand complexes of the 1∶1Ln(III)-1,2-diaminocyclo-hexane-tetraacetic acid (CDTA) chelate with hydroxy acids [where hydroxy acids = salicylic acid (SA); Sulphosalicylic acid (SSA) and 8-hydroxyquinoline-5-sulphonic acid (HQSA)] have been investigated by potentiometric titration. Their formation constants have been calculated (μ=0.1M-KNO3; andt=30±1°C) as 4.60±0.03, 5.46±0.03, 5.87±0.05; 3.12±0.04, 3.95±0.05, 4.42±0.07; 2.73±0.06, 3.45±0.05 and 3.90±0.08 forLn(III)-CDTA-SA,-SSA, and-HQSA respectively (whereLn=La, Pr or Nd). The value of logK MAB follows the order: La(III)<Pr(III)<Nd(III).

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Authors and Affiliations

  1. Chemical Laboratories, University of Rajasthan, Jaipur, India

    Hari S. Rana &  Jagdish P. Tandon

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  1. Hari S. Rana
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  2. Jagdish P. Tandon
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Rana, H.S., Tandon, J.P. Mischligandenkomplexe einiger Seltener Erden. Monatshefte für Chemie 106, 1381–1388 (1975). https://doi.org/10.1007/BF00913613

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  • DOI: https://doi.org/10.1007/BF00913613

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