Journal ArticleDOI
pH-Metrische Untersuchungen über einige Komplexe von Seltenen Erden mit gemischten Liganden
Hari S. Rana,J. P. Tandon +1 more
TLDR
The biligand systems, Ln(III)-Aminopolycarboxylic acid (A-CARB) and A-CARYCLIC acid (CARB), have been studied pH-metrically and the analysis of the titration curves has shown the formation of 1 : 1: 1 mixed ligand complexes.Abstract:
The biligand systems, Ln(III)-Aminopolycarboxylic acid1-Aminopolycarboxylic acid2 — have been studied pH-metrically and the analysis of the titration curves has shown the formation of 1 : 1 : 1 mixed ligand complexes. Their formation constants have been calculated at 30±1°C and the value of log K follows the order La(III)<Pr(III)<Nd(III).read more
Citations
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Potentiometric studies on stepwise biligand complex formation La(III), Pr(III) or Nd(III)-cyclo hexane-1, 2-diaminotetraacetic acid-hydroxy acid
H.S. Rana,Jagdish P. Tandon +1 more
TL;DR: In this paper, a 1:1 Ln(III)-CDTA binary chelate with certain hydroxy acids such as glycollic (GA), lactic (LA) and malic (MEA) is described.
Journal ArticleDOI
Thermodynamics of mixed-ligand complexation of cerium group lanthanide ethylenediaminetetraacetates
TL;DR: In this article, the thermodynamic parameters for mixed-ligand complexation of LnEdta− (Ln3+ = La3+, Ce3+, Pr3+, Nd3+, Sm3+, Gd3+) with iminodiacetate and nitrilotriacetate ions in aqueous solution at 298.15 K and ionic strength I = 0.5 (KNO3) were determined by calorimetry and pH-metry.
References
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Journal ArticleDOI
Stability of Metal Chelates. I. Iminodiacetic and Iminodipropionic Acids
S. Chaberek,A. E. Martell +1 more
Journal ArticleDOI
Komplexone XXX. Diäthylentriamin-pentaessigsäure (DTPA)†
TL;DR: In this article, the stability constants of DTPA-EDTA-complexes with metal cations were determined using 7 methods, and the stability of these species with Ca, Mn, FeII, FeIII, Co, Ni, Cu, Zn, Cd, Pb, Hg, Ce have been determined.
Journal ArticleDOI
Synergic effects in the solvent extraction of the actinides—IV: Trivalent plutonium, americium and europium
H. Irving,D.N. Edgington +1 more
TL;DR: In this article, the authors used radioactive tracers to extract plutonium, americium and europium from 0·01 N hydrochloric acid, 0·001 N nitric acid, and an acetate buffer of pH 3·95 respectively.
Journal ArticleDOI
Complexes of the Rare Earths. III. Mixed Complexes with N-Hydroxyethylethylenediaminetriacetic Acid
TL;DR: In this article, the tendency of rare earth-N- hydroxyethylethylenediaminetriacetic acid (Ln(HEDTA)) chelates to form mixed 1: 1:1:1 (HOGA) chelsates with N-hydroxyethyliminodiacetic acid was investigated and the mixed complexes were quite stable and the formation constants exhibited trends.
Journal ArticleDOI
Observations on the rare earths—LXXIII the heat and entropy of formation of the 1:1 chelates of N-hydroxyethylethylenediaminetriacetic acid with the tripositive cations
T. Moeller,R. Ferrús +1 more
TL;DR: In this article, entropy changes in the formation of N-hydroxyethylethylenediaminetriacetic acid (H3HEDTA) chelates of the tripositive rare-earth metal ions have been evaluated by the temperature coefficient method for aqueous solutions of ionic strength 0·1(KNO3). Corresponding entropy changes have been calculated from the enthalpy changes and stability constants at 25°.