Rates and Mechanisms of Protolysis of Di- and Trimethylammonium Ions Studied by Proton Magnetic Resonance
- 1 November 1957
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 27 (5) , 1067-1071
- https://doi.org/10.1063/1.1743933
Abstract
A kinetic analysis of the protolysis reactions of di‐ and trimethylammonium ions in aqueous solution has been carried out using the nuclear magnetic resonance technique. The results complement those of a similar study of methylammonium ion reported on in an earlier paper. In the pH range studied (between 3 and 5) the main mechanism is: RNH++RN⇆RN+RNH+. The reaction involves water in nearly every exchange. The measured rate constants are: 6.0×108 and 3.1×108 sec—1M—1 for di‐ and trimethylammonium, respectively.Keywords
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