The quadrupoles and its formation constant in an electrolytic solution of lithium perchlorate in tetrahydrofuran plus formic acid, at 298.15 K

The condutance data for the electrolytic solutions of LiclO4 in a mixture of tetrahydrofuran (THF) plus formic acid, indicate the existence of pairs, triple ions and quadrupoles. The association constantes K sub(a) and K sub(t) for the ion pairs and triple ions, respectively, have been included in a previous paper, where those experimental results have been published. Now, through an analysis accounting simultaneously for the pairs, triple ions and quadrupoles in the solution, the quadrupole formation constant K sub(q) has been calculated, together with K sub(a) and K sub(t). The activity coefficients have been obtained by means of the Debye-Huckel's theory, Stockes radii and solvation numbers have been estimated and the structure of the ionic aggregates discussed. (Author)