Abstract
The loss of tritium from STAo-H/sup 3/! p-cresol was studied kinetically in aqueous hydrochloric acid in the approximate concentration range 3.5 to 6.5N. The reaction velocity was found to have the same dependence on acidity as the previously investigated exchange of STAo-H/sup 2/!p-cresol. At the same acidity, detritiation is 2 to 3 times slower than deuteration. The detritiation cccurs 1.62 times faster in deuterium oxide than in protium oxide solutions of 4N hydrochloric acid. The velccity in mixtures of deuterium oxide and water follows the predictions of the Gross-Butler theory. The mechanism of aromatic hydrogen exchange is discussed. (auth)
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