Thermodynamics of the weak interaction between samarium cation and xylitol in water: A chemical model

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Journal of Solution Chemistry; (United States)

DOI:https://doi.org/10.1007/BF00973108· OSTI ID:7275922

Rongere, P; Morel-Desrosiers, N; Morel, J P ^[1]

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1. Universite Blaise Pascal, Aubiere (France)

The thermodynamic characterization of the weakly complexed model system Sm[sup 3+]-xylitol has been carried out. The standard Gibbs energy, enthalpy, entropy, volume and heat capacity of complexation of Sm[sup 3+] by xylitol have been determined in water at 25[degrees]. The stability constant and the enthalpy change have been simultaneously determined by using a calorimetric method. The thermodynamic properties characterizing solely the specific interaction between the cation and the complexing sequence of hydroxyl groups of the ligand have been isolated. The stability constant and the volume of complexation have also been estimated from a similar treatment of the apparent molar volumes. It was found that the reaction by: K = 8.1, [Delta][sub r]G[sup o] = -5.2 kJ-mol[sup [minus]1], [Delta][sub r]H[sup o] = -13.7 kJ-mol[sup [minus]1], T[Delta][sub r]S[sup o] = -8.5 kJ-mol[sup [minus]1], [Delta][sub r]V[sup o] = 8.8 cm[sup 3]-mol[sup [minus]1] and [Delta][sub r]C[sup o[sub p]] = 51 J-K[sup [minus]1]-mol[sup [minus]1].

• OSTI ID: 7275922
• Journal Information: Journal of Solution Chemistry; (United States), Journal Name: Journal of Solution Chemistry; (United States) Vol. 23:3; ISSN 0095-9782; ISSN JSLCAG
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
CALORIMETRY
CATIONS
CHARGED PARTICLES
COMPLEXES
ENERGY
ENTHALPY
ENTROPY
FREE ENTHALPY
HYDROXY COMPOUNDS
IONS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPLEXES
SAMARIUM COMPLEXES
SPECIFIC HEAT
STABILITY
THERMODYNAMIC PROPERTIES