The thermodynamics of 1,4,7,10,13 - pentaazatridecane complexes of silver(I) in dimethyl sulfoxide.

The thermodynamic parameters Delta G degrees, Delta H degrees and Delta S degrees for the formation of silver(I) mononuclear (AgL(+)) and polynuclear ([Ag(2)L](2+), [Ag(3)L(2)](3+)) complexes with 1,4,7,10,13-pentaazatridecane (L = tetren) have been obtained in dimethyl sulfoxide (dmso) at 25 degrees C and in an ionic medium of 0.1 mol dm(-3). The complexes are enthalpy stabilized while the entropy contributions oppose their formation. Tetren, differently from other linear polyamines which have only aminoethylenic subunits and less than Eve nitrogens, is able to form polynuclear species in dmso. Structures and stabilities of the complexes are discussed in relation to the characteristics of the ligand