Kinetics of anation of chromium(III) by L-phenylalanine |
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| Authors: | Kabir-ud-Din Iqrar A Khan Mohammad Shahid |
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| Institution: | (1) Department of Chemistry, Aligarh Muslim University, 202001 Aligarh, India;(2) Department of Chemistry, Faculty of Science, Garyounis University, P.O. Box 9480, Benghazi, Libya |
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| Abstract: | Summary The kinetics of anation of chromium(III) species, Cr(H2O)6]4+ and Cr(H2O)5OH]2+, by L-phenylalanine in aqueous acid has been studied spectrophotometrically. Effects of varying substrate], ligand], H+],  , % ethanol and temperature were investigated. The kinetic data suggest a mechanism where outersphere-associations between chromium(III) species and phenylalanine in the zwitterionic form] precede anation. Comparison of the results with published data suggest an Ia path for the Cr(H2O)6]3+ reaction and Id path for the Cr(H2O)5OH]2+ reaction. |
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