Thermodynamics of complexation of lanthanides by 3-fluoro- 4-fluoro- and 3-nitrobenzoic acids

The thermodynamic parameters (log ..beta../sub 181/, and ..delta..H/sub 181/) for the formation of the LnL/sup 2 +/ complexes between lanthanide cations and 3-fluoro-, 4-fluoro, and 3-nitrobenzoate anions (L/sup -/) were determined by potentionmetric and calorimetric titrations in 0.10 M (NaClO/sub...

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Veröffentlicht in:	Inorg. Chem.; (United States) 1986-09, Vol.25 (19), p.3512-3514
Hauptverfasser:	Choppin, Gregory R, Lajunen, Lauri H. J
Format:	Artikel
Sprache:	eng
Schlagworte:	400201 - Chemical & Physicochemical Properties BENZOIC ACID CARBOXYLIC ACIDS CHEMICAL PREPARATION Chemical thermodynamics Chemistry COMPLEXES Elements, mineral and organic compounds Exact sciences and technology General and physical chemistry General. Theory INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY Metals and alloys Mixtures MONOCARBOXYLIC ACIDS NITRO COMPOUNDS ORGANIC ACIDS ORGANIC COMPOUNDS ORGANIC FLUORINE COMPOUNDS ORGANIC HALOGEN COMPOUNDS ORGANIC NITROGEN COMPOUNDS RARE EARTH COMPLEXES SYNTHESIS Thermodynamic properties THERMODYNAMICS
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Zusammenfassung:	The thermodynamic parameters (log ..beta../sub 181/, and ..delta..H/sub 181/) for the formation of the LnL/sup 2 +/ complexes between lanthanide cations and 3-fluoro-, 4-fluoro, and 3-nitrobenzoate anions (L/sup -/) were determined by potentionmetric and calorimetric titrations in 0.10 M (NaClO/sub 4/) ionic strength aqueous solution at 25/sup 8/C. The stabilities of the present complexes agreed with the relationship for monocarboxylate complexation (e.g. log ..beta../sub 181/ vs. log K/sub 811/). 7 references, 2 figures, 5 tables.
ISSN:	0020-1669 1520-510X
DOI:	10.1021/ic00239a037