A kinetic and equilibrium study of the reaction of glycine with chromium(III) in aqueous solution
- 1 January 1984
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 8,p. 1647-1650
- https://doi.org/10.1039/dt9840001647
Abstract
The formation of tetra-aquaglycinatochromium(III) from glycine and chromium(III) has been studied at pH = 3.0–3.8, 40–54 °C, and I= 0.4 mol dim–3(NaClO4). The equilibrium constant (log10K1) is 7.60 at 44.8 °C. The reaction obeys the rate equation kobs.=k+k′[H+]–1 and under all the conditions studied is zero order in the concentration of glycine. A mechanism involving extensive outer-sphere complexation of hexa-aquachromium(III) and its conjugate base is proposed. The activation parameters are compared to literature values.Keywords
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