EFFECT OF ANIONS IN AMMONIUM-SALTS ON THE REACTIVITY OF THE SALTS IN HYDROGEN-ISOTOPE EXCHANGE-REACTION

The hydrogen-isotope exchange reactions between five ammonium salts (solid) and tritiated water vapor have been observed at 50 similar to 90 degrees C to reveal the behavior of the hydrogen atoms in the salts. The reaction data were analyzed with the A''-McKay plot, and the following four items have been quantitatively clarified in the reaction. (1) The reactivity of the H atoms in the salts increases with a rise in temperature. (2) Both the reactivity and the temperature dependence of the reactivity in each salts increase with the electronegativities of the anion in the salt. (3) The reactivity in ammonium salts is much larger than those of primary and secondary amines. (4) The reactivity in certain ammonium salts can be estimated with both the electronegativities of the anions in the salts and the method used in this work.