The Palladium(Ii)-Picolylamine Promoted Hydrolysis of Amino Acid Esters; Kinetic Evidence for Inter- and Intramolecular Mechanisms-Reference-Cited by-同舟云学术

The Palladium(Ii)-Picolylamine Promoted Hydrolysis of Amino Acid Esters; Kinetic Evidence for Inter- and Intramolecular Mechanisms

Published:2011-08 Issue:3 Volume:36 Page:215-226
ISSN:1468-6783
Container-title:Progress in Reaction Kinetics and Mechanism
language:en
Short-container-title:Progress in Reaction Kinetics and Mechanism

Author:

Shoukry Mohamed M.¹,El-Sherif Ahmed A.¹

Affiliation:

1. Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt

Abstract

The hydrolysis of amino acid esters is catalysed by the palladium(II) complex [Pd(Pic)]2+ (Pic = 2-picolylamine). The reaction has been studied by the pH-stat technique. The overall PdII chelate-promoted hydrolysis of the ethyl esters of glycine and alanine may be accounted by inter-and intramolecular mechanisms depicted in Eqns (1) and (2) respectively. [Formula: see text] (1) [Formula: see text] (2) The kinetic data for histidine and methionine methyl esters are fitted assuming that hydrolysis proceeds solely by the intermolecular mechanism [Eqn (1)]. The rate enhancement compared with the free ester is discussed in terms of the structure of the complex. Activation parameters associated with the hydrolysis have been determined and discussed.

Publisher

SAGE Publications

Subject

Physical and Theoretical Chemistry

Link

http://journals.sagepub.com/doi/pdf/10.3184/146867811X13095331158775

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