Application of Nuclear Magnetic Resonance to the Study of Acid-Base Equilibria

Abstract
Acid‐base equilibria in aqueous solutions of methylamine, dimethylamine, and trimethylamine have been studied by nuclear magnetic resonance. It is shown that the chemical shift of the methyl protons is a linear function of the concentration ratio of acid to base plus acid. The NMR spectrum of tetramethylammonium ion is also given.