Abstract
The rate of decomposition
of p-nitrophenyl acetate, pnpa, has been measured at
298 K in benzene solutions of a series of dodecylammonium 4-substituted
phenoxide salts, CH3(CH2)11NH3+
-OC6H4X-p (where X = H, Cl, Br,
Me or MeO). Absorbance measurements indicate that
aggregation of these compounds occurs at concentrations greater than 10-4
mol dm-3 in benzene. The observed rate constants of aminolysis are
affected by the basicity of the phenol. In the presence of solubilized water
the rate of decomposition of pnpa is increased
slightly due to an increase in the effective concentration of the free amine
and due to the occurrence of hydrolysis. The effect of an increase in
temperature and of a change in solvent (to toluene) has been studied.
Cited by
4 articles.
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