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  • Articles: DFG German National Licenses  (1)
  • Electronic Resource  (1)
  • Hydrolysis of ternary complexes  (1)
  • 1
    ISSN: 1434-4475
    Keywords: Hydrolysis of ternary complexes ; pH-metric measurements ; Stability constants of monohydroxy ternary complexes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurden ternäre Komplexe von La(III), Pr(III), Nd(III), Gd(III) und Dy(III) mit gemischten Liganden [Iminodiessigsäure (IMDA) und Citraconsäure (CCA) oder Maleinsäure (MIA)] mittelspH-metrischer Methoden untersucht. Diese Komplexe werden über die stufenweise Addition des Sekundärliganden (IMDA) zu den primär gebildeten 1:1 Ln(III)—CCA/MIA Spezies gebildet. Zugleich erleiden die resultierenden ternären Komplexe Hydrolyse und gehen in die entsprechenden Hydroxo-Komplexe über. Die Stabilitätskonstanten der Hydroxo-Komplexe wurden für konstante Temperatur (27 ± 1°C) und Ionenstärke (I=0.1M KNO3) berechnet. Die relative Reihung bezüglich der Stabilitäten ergab sich folgendermaßen: La(III)〈Pr(III)〈Nd(III)〈Gd(III)〈Dy(III).
    Notes: Abstract Mixed-ligand ternary complexes of La(III), Pr(III), Nd(III), Gd(III), and Dy(III) with iminodiacetic acid (IMDA) and citraconic (CCA) or maleic acid (MIA), have been studiedpH-metrically. Their formation takes place through the stepwise addition of the secondary ligand (IMDA) to the initially formed 1:1, Ln(III)—CCA/MIA binary species. The resulting ternary complexes undergo hydrolysis to form their hydroxo derivatives simultaneously. The stability constants of the hydroxo species are calculated for constant temperature (27 ± 1°C) and ionic strength (I=0.1M KNO3). The relative order of stability is: La(III)〈Pr(III)〈Nd(III)〈Gd(III)〈Dy(III).
    Type of Medium: Electronic Resource
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