Spectrochemistry of solutions. Part 7. Raman studies of the effects of cationic complexing agents on ion association in liquid-ammonia solutions of alkali-metal salts

Abstract

The Raman spectra of sodium and potassium salts of [NO₃]^–, [NO₂]^–, [NCO]^–, [NCS]^–, [N₃]^–, and [CN]^– in liquid ammonia in the presence of an equimolar amount of the cryptand C222 show a set of single bands characteristic of the free solvated anion. The presence of the ether benzo-15-crown–5 had comparatively little effect on the spectra of sodium and potassium cyanides, which displayed bands characteristic of ion-associated species. The effects of cation-complexing agents on ion association in liquid-ammonia solutions are briefly discussed.