NOVEL H-BONDING IN ACID SOAPS AND PRESSURE-INDUCED PROTON SHIFT - AN FT-IR APPROACH

Acid potassium soaps (KHA(2), in which A stands for carboxylate) of my ristic acid, palmitic acid, and stearic acid were studied with a Fouri er-transform infrared spectrometer. The infrared spectra of the acid s oaps showed only one carboxylate mode in the range 1800-1500 cm(-1). I t is suggested that a new type of H-bonding, in which the proton is sh ared by two carboxylate groups, exists in the acid soaps. In this work , it was also observed that these acid soaps underwent structural tran sitions with increasing pressure. The spectral results are analysed an d discussed.