Abstract

In this study, the protonation constants of ethyl- and methyl- esters of glycine, Lalanine, L-valine, L-leucine, L-phenylalanine, L-serine, L-methionine were determined by potentiometric titration method in water. The titrations were performed at 25°C, in nitrogen atmosphere and during the titrations ionic strength of the medium was maintained at 0.1M by using sodium chloride. The data of potentiometric titration were evaluated by PKAS computer programme and effects of alkyl group on the basicity of α- amino acid esters are discussed.

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