Investigations on the extraction equilibrium of ion-association complexes of tetrathiocyanatozincate (II) with mono- and ditetrazolium salts

Summary

Investigations on the Extraction Equilibrium of Ion-Association Complexes of Tetrathiocyanatozincate(II) with Mono- and Ditetrazolium Salts

Extraction investigations of ternary ion-association complexes of thiozyanatozinc (II) ions with mono- and ditetrazolium salts between two liquid phases, water and dichloroethane, have been made. From the extraction constant and distribution constant obtained, both characterizing the extraction, the association constants of the abovementioned complexes were calculated. The association constants, characterizing the stability in aqueous medium are:

$$\begin{gathered} \beta _{TT_2 } [Zn(SCN)_4 ] = 1.78 \times 10^7 \pm 0.01 \times 10^7 \hfill \\ \beta _{ITT_2 } [Zn(SCN)_4 ] = 1.76 \times 10^7 \pm 0.01 \times 10^7 \hfill \\ \beta _{NBT} [Zn(SCN)_4 ] = 2.63 \times 10^3 \pm 0.02 \times 10^3 \hfill \\ \beta _{NTC} [Zn(SCN)_4 ] = 3.02 \times 10^3 \pm 0.08 \times 10^3 \hfill \\ \end{gathered} $$