Affinity of Tripodal and Linear Tetraamines for Silver(I) in Dimethyl Sulfoxide

The thermodynamic functions of the complexation of Ag(I) by the tripodal ligands, tris(2-(methylamino)ethyl)amine (Me 3 tren) and tris(2-(dimethylamino)ethyl)amine (Me 6 tren) (L), are determined in dimethyl sulfoxide (DMSO) by potentiometric and calorimetric techniques at 298.0 K and 0.1 mol⋅dm −3...

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Bibliographic Details
Published in:Journal of solution chemistry 2008-04, Vol.37 (4), p.543-551
Main Authors: Del Piero, Silvia, Fedele, Rosalisa, Melchior, Andrea, Polese, Pierluigi, Portanova, Roberto, Tolazzi, Marilena
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Exact sciences and technology
General and physical chemistry
Geochemistry
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Oceanography
Physical Chemistry
Simec'06
Solutions
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Summary:The thermodynamic functions of the complexation of Ag(I) by the tripodal ligands, tris(2-(methylamino)ethyl)amine (Me 3 tren) and tris(2-(dimethylamino)ethyl)amine (Me 6 tren) (L), are determined in dimethyl sulfoxide (DMSO) by potentiometric and calorimetric techniques at 298.0 K and 0.1 mol⋅dm −3 ionic strength (Et 4 NClO 4 ). A comparison is made between previous data concerning Ag(I) complex formation with the non-alkylated tripodal 2,2′,2″-triaminotriethylamine (tren), in order to analyze the influence of N-methylation on this type of branched donor, and with those relative to the linear triethylenetetramine (trien) and 1,1,4,7,10,10-hexamethyltriethylenetetramine (Me 6 trien). The results are discussed taking into account different σ -donating properties, geometric arrangement of the ligands, steric repulsions and solvation effects.
ISSN:0095-9782
1572-8927
DOI:10.1007/s10953-008-9270-6