Kinetics of oxidation of DL-aspartic acid was studied at 30°C with Au(III) in sodium acetate–acetic acid buffer medium to investigate the mechanism of oxidation the presence and absence of nonionic micelle, Triton X-100. The rate of the reaction is fractional with respect to Asp and ionic strength has negligible effect. The rate of the reaction is inhibited by [Cl–] and [AuIII]. The reaction is accelerated initially by increase in pH and then showed a retardation over the value of 3.90, displaying that the rate depends on [H+]. This reaction is inhibited in the presence of Triton X-100. A mechanism involving zwitterionic species of aspartic acid and AuCl3OH– of oxidant has been proposed.
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One of the authors, Rama Rajeswari Makena, thanks UGC SERO, India for minor research project (no. F MRP-4551/14 (SERO/UGC), dated 17 March 2014), and Andhra University, Visakhapatnam, India for providing the research facilities.
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Makena, R.R., Rallabandi, R. & Parvataneni, V. Kinetic and Mechanistic Studies on the Oxidation of DL-Aspartic Acid with Gold(III) in Aqueous and Micellar media. Russ. J. Phys. Chem. B 13, 915–922 (2019). https://doi.org/10.1134/S1990793119060241
- DL-aspartic acid
- Triton X-100