Oxidation Studies. Part VI Kinetics of Oxidation of Some Amino Acids by Ce 4+ in H2SO4 Medium in the Presence and Absence of Ag+
| Main Authors: | M. ADINARAYANA, B. SETHURAM, T. NAVANEETH RAO |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1976
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6396450 |
Daftar Isi:
- Department of Chemistry, Osmania University, Hyderabad-500 007 Manuscript received 12 Mag 1976; accepted 23 August 1976 Kinetics of oxidation of amino acids viz., serine, threonine, aspartic acid and glutamic acid were studied in presence and absence of Ag+. Glycine and \(\alpha\)-alanine were oxidised only in the presence of Ag+. In the absence of Ag+ the order of [Ce4+] and [amino acid] were found to be one each and the mechanism is explained by a straightforward bimolecular reaction between Ce4+ and amino acid. In the presence of Ag+, the order of [Ce4+] was found to be unity and that of [amino acid] and [Ag+] were fractional. The observed rate law was explained by assuming the formation of an adduct between amino acid and Ag+ in a fast step. This adduct was assumed to react with Ce4+ in the rate determining step to yield Ag2+-substrate adduct which ultimately undergoes internal oxidation in a fast step to give the products. The formation constants of the adduct (K) and bimolecular rate constants for the slow step (k) at different temperatures and other activation parameters are presented and discussed.