In protophobic aprotic solvents with relatively high permitivities (20 < ε_r < 65), the formation of higher ion-aggregates from 1:1 electrolytes (MX) was observed by means of conductometry. Observed molar conductivities (Λ/S cm² mol^-1) were quantitatively explained by ion-pairs (M⁺X^-), symmetrical triple ions (M₂X⁺, MX₂^-) and quadrupoles (M₂X₂). The conditions for the minimum on Λ – C^1/2 curves were represented by computer simulations. The motive forces for ion-aggregates were attributed to hydrogen-bonding and coordination forces as well as the electrostatic force.