Polarographic Study of the Complexation of Na⁺ and K⁺ Ions by Dibenzo-18-crown-6 in Non-Aqueous Solution

Abstract

Complexes of Na⁺ and K⁺ ions with dibenzo-18-crown-6 (6,7,9,10,17,18,20,21-octahydro-dibenzo[ b,k ] [1,4,7,10,13,16] hexaoxacyclooctadecin ) were studied by polarography in several non-proton-donating media. Their stability constants are strongly influenced by the solvents, and vary inversely with the Gutmann donicity scale and with the Persson HD_S parameter which is a measure of the hardness for these solvents.