Abstract
The kinetics of base hydrolysis of amino acid esters, glycine-, histidine-, and methionine methyl esters in the presence of [Pd(Et4en))(H2O)2]2+ is studied in aqueous solution at 25°C and I = 0.1 mol dm−1 (Et4en = N,N,N′,N′-tetraethylethylenediamine). The rate of ester hydrolysis for glycine methyl ester is studied at different temperatures and dioxane–water solutions of different compositions. The kinetic data fit a model which assumes that hydrolysis proceeds in one step. Hydrolysis of the esters is catalyzed by [Pd(Et4en)(H2O)2]2+ with catalysis ratio values of 2.5 × 104, 3.15, and 7.43 for glycine-, histidine-, and methionine methyl esters, respectively. Activation parameters for the base hydrolysis are evaluated.
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