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

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Abstract

The thermodynamic functions of the complexation of Ag(I) by the tripodal ligands, tris(2-(methylamino)ethyl)amine (Me3tren) and tris(2-(dimethylamino)ethyl)amine (Me6tren) (L), are determined in dimethyl sulfoxide (DMSO) by potentiometric and calorimetric techniques at 298.0 K and 0.1 mol⋅dm−3 ionic strength (Et4NClO4). 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 (Me6trien). The results are discussed taking into account different σ-donating properties, geometric arrangement of the ligands, steric repulsions and solvation effects.

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Authors and Affiliations

  1. Dipartimento di Scienze e Tecnologie Chimiche, Università di Udine, Via Cotonificio 108, 33100, Udine, Italy

    Silvia Del Piero, Rosalisa Fedele, Andrea Melchior, Pierluigi Polese, Roberto Portanova & Marilena Tolazzi

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  1. Silvia Del Piero
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  2. Rosalisa Fedele
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  3. Andrea Melchior
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  4. Pierluigi Polese
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  5. Roberto Portanova
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  6. Marilena Tolazzi
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Correspondence to Andrea Melchior.

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Del Piero, S., Fedele, R., Melchior, A. et al. Affinity of Tripodal and Linear Tetraamines for Silver(I) in Dimethyl Sulfoxide. J Solution Chem 37, 543–551 (2008). https://doi.org/10.1007/s10953-008-9270-6

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