Summary.
The kinetics of the formation of the 1:3 complex of chromium(III) with L-glutamic acid and DL-lysine were studied spectrophotometrically at and 550 nm. The reaction was found to be first order in both reactants. Increasing the hydrogen ion concentration from 3.2×10−5 to 1.0×10−3 molċdm−3 retarded the reaction rate which is of the form . Values of 28.8 and 63.6 kJċmol−1 were obtained for the energy of activation and −184 and −116 Jċ K−1ċmol−1 for the entropy of activation for L-glutamic acid and DL-lysine. The logarithms of the formation constants of the two complexes were found to be 5.9 and 5.1.
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Received January 7, 2000. Accepted (revised) March 8, 2000
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Guindy, N., Abou-Gamra, Z. & Abdel-Messih, M. Kinetic Studies on the Complexation of Chromium(III) with some Amino Acids in Aqueous Acidic Medium. Monatshefte fuer Chemie 131, 857–866 (2000). https://doi.org/10.1007/s007060070063
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DOI: https://doi.org/10.1007/s007060070063