Structural changes of 2-dimethylamino-benzoic acid in solution—a spectral deconvolution study

Abstract

Fourier deconvolution has resolved the broad carboxylic bands in 2-dimethylamino-benzoic acid to a number of individual bands which helped to identify the various species in solution. While neutral species with or without an intramolecular hydrogen bond predominate in non-polar solvents, the Zwitterionic species with or without an intramolecular hydrogen bond are the main species in polar solvents. The strong solvating power of water was able to break the strong intramolecular charge transfer hydrogen bond present in 2-dimethylamino-benzoic acid.