Relaxation kinetic study of iron(III) chelation with glycolic and lactic acids. Contribution of intermediate steps to the limiting rate in the overall process
✍ Scribed by F.P. Cavasino; E. Di Dio; C. Sbriziolo
- Publisher
- Elsevier Science
- Year
- 1982
- Weight
- 487 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0378-4487
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✦ Synopsis
The kinetics of formation of iron(lII1 monochelates with glycolic and lactic acids have been investigated by the temperature-jump : method at 25.0°C and ionic strengthl.OM over the acidity range 0.0200-0.900M. The kinetic data indicate that two reaction paths, ?+ involving the FeOH ion and the neutral and anionic (HL-L-1 forms of the ligands, lead to the iron(III1 chelate formation and that the monodcntate complex Fe(OHlL-LIj+ 1s formed as an intermediate compound. Moreover the observed Ii + III -dependence of the forward rate constants permits us to estimate the contribution of intermediate steps to the limiting rate in the overall chelate formation process.