Journal ArticleDOI
Stabilité des carboxylates de terres, III. Maléates, méthylsuccinates et malates
Raymond Roulet,J. Feuz,T. Vu Duc +2 more
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In this paper, the stability constants of maleates, methylsuccinates and malates of rare earths have been determined at 25.0 °C and at ionic strength 0,100 (NaClO4) by a potentiometric method.Abstract:
The stability constants of maleates, methylsuccinates and malates of rare earths have been determined at 25.0 °C and at ionic strength 0,100 (NaClO4) by a potentiometric method. Each ligand forms 1 : 1 and 1 : 2 complexes in aqueous solution, the malates being the most stable. The first and the second dissociation constants of the ligand acids were also measured. The 1 : 2 maleates of La, Pr, Nd, Sm, and Eu have been isolated.read more
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The aqueous geochemistry of the rare-earth elements: Critical stability constants for complexes with simple car☐ylic acids at 25°C and 1 bar and their application to nuclear waste management
TL;DR: In this article, available stability constants for the formation of rare-earth elements (REE) complexes with the organic ligands acetate, adipate, benzoate, citrate, ETDA, formate, fumarate, glutarate, glycolate, α-hydroxyisobutyrate, β-mercaptoacetate, oxalate, m-phthalate, ophthalates, propionate, salicylate and succinate have been evaluated.
Journal ArticleDOI
Carboxylates of rare earth elements
TL;DR: In this paper, the structural aspects of the coordination modes are presented and discussed from the statistical point of view and the most typical groups of carboxylate complexes are reviewed, including simple carboxyates, acyclic aminopolycarboxylates and dipicolinates.
Journal ArticleDOI
Lanthanide ions activate alpha-amylase.
Journal ArticleDOI
Malonate complexing of lanthanide ions
TL;DR: In this article, the stability constants and enthalpies of formation for the formation of the lanthanide monomalonato complexes were determined by potentiometric and calorimetric titrations in solutions of 0·10 M (NaClO4) and 2·00 M ionic strength.
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Journal ArticleDOI
Coördination Compounds. II. Trends in the Stability of Some Rare Earth Chelates
TL;DR: In this paper, a potentiometric study was made of the chelates formed by the cerium group of rare earth chlorides (lanthanum, cerium, praseodymium, and neodynium) with several types of organic compounds, including the amino, hydroxy and mercapto analogs of acetic, propionic, benzoic, and succinic acids.
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Stability trends of 1:1 and 2:1 dialkylmalonato rare-earth chelates.
TL;DR: In this paper, the step-formation constants of the 1 : 1 and 2 : 1 malonato, diethylmalonato and di- n -propylmaloneato were determined at ionic strength 0·100 (KNO 3 ) at 25·0°C by a potentiometric method.
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Stabilité des carboxylates de terres rares I Furanne- et thiophène-carboxylates-2
Raymond Roulet,J. Feuz,T. Vu Duc +2 more
TL;DR: In this paper, the stability constants of 2-furanecarboxylates and 2-thiophencarboxylate of some rare earths have been determined at ionic strength 0.100 (NaClO4) at 25.0°C by a potentiometric method.
Journal ArticleDOI
Stabilité des carboxylates de terres rares, II. Bis‐hydroxyméthyl‐2,2‐propionates
Raymond Roulet,T. Vu Duc +1 more
TL;DR: The stability constants of 2, 2-bis-hydroxymethylpropionates of rare earths have been determined at ionic strength 0,100 (NaClO4) at 25.0°C by a potentiometric method as mentioned in this paper.