Effect of 1,1,2,2-tetrachloroethane on the ionizing ability of complexes of HCl with DMF

The acidity function (H _o) of solutions of HCI (0–7.1 mol L^?1) in an equimolar mixture of DMF-1,1,2,2-tetrachloroethane (TCE) has been determined by the indicator method at 25 °C. Data on the relative ionizing activity of complexes of HCI with DMF with various compositions and structures have been obtained. In the ternary system HCI-DMF-TCE, the ionizing ability of the complexes of DMF with HCI of the compositions 2 : 1 and 1 : 1 with a quasiionic structure decreases compared to the HCI-DMF system, and that of the complex of the composition DMF · 2HC1 with a structure of an ion pair Me₂NHCOH⁺ · (CIHCI)^? with a strong centrosymmetrical H-bond in the anion increases.