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Kinetics and Mechanism of Oxidation of Methionine by Chromium(VI): Edta Catalysis

Subbiah Meenakshisundaram ; Department of Chemistry, Annamalai University, Annamalainagar – 608 002, India
Rajagopal Vinothini ; Department of Chemistry, Annamalai University, Annamalainagar – 608 002, India

Puni tekst: engleski, pdf (92 KB) str. 75-80 preuzimanja: 644* citiraj
APA 6th Edition
Meenakshisundaram, S. i Vinothini, R. (2003). Kinetics and Mechanism of Oxidation of Methionine by Chromium(VI): Edta Catalysis. Croatica Chemica Acta, 76 (1), 75-80. Preuzeto s https://hrcak.srce.hr/103071
MLA 8th Edition
Meenakshisundaram, Subbiah i Rajagopal Vinothini. "Kinetics and Mechanism of Oxidation of Methionine by Chromium(VI): Edta Catalysis." Croatica Chemica Acta, vol. 76, br. 1, 2003, str. 75-80. https://hrcak.srce.hr/103071. Citirano 25.02.2021.
Chicago 17th Edition
Meenakshisundaram, Subbiah i Rajagopal Vinothini. "Kinetics and Mechanism of Oxidation of Methionine by Chromium(VI): Edta Catalysis." Croatica Chemica Acta 76, br. 1 (2003): 75-80. https://hrcak.srce.hr/103071
Harvard
Meenakshisundaram, S., i Vinothini, R. (2003). 'Kinetics and Mechanism of Oxidation of Methionine by Chromium(VI): Edta Catalysis', Croatica Chemica Acta, 76(1), str. 75-80. Preuzeto s: https://hrcak.srce.hr/103071 (Datum pristupa: 25.02.2021.)
Vancouver
Meenakshisundaram S, Vinothini R. Kinetics and Mechanism of Oxidation of Methionine by Chromium(VI): Edta Catalysis. Croatica Chemica Acta [Internet]. 2003 [pristupljeno 25.02.2021.];76(1):75-80. Dostupno na: https://hrcak.srce.hr/103071
IEEE
S. Meenakshisundaram i R. Vinothini, "Kinetics and Mechanism of Oxidation of Methionine by Chromium(VI): Edta Catalysis", Croatica Chemica Acta, vol.76, br. 1, str. 75-80, 2003. [Online]. Dostupno na: https://hrcak.srce.hr/103071. [Citirano: 25.02.2021.]

Sažetak
The kinetics of the oxidation of DL-methionine to sulfoxide by CrVI has been studied in aqueous acetic acid in the presence of sodium salt of ethylenediaminetetraacetic acid (edta). It appears that CrVI-edta is the active electrophile. The low dielectric constant of the medium favours the reactivity. Ionic strength and MnII have no significant effect on the conversion. The ratio k(D2O) / k(H2O) ≈ 1 does not seem to indicate any significant solvent isotope effect. Highly negative ΔS# values indicate a structured transition state. A ternary intermediate has been envisaged for describing the enhanced reactivity.

Ključne riječi
kinetics; oxidation; edta catalysis; methionine; chromium(VI)

Hrčak ID: 103071

URI
https://hrcak.srce.hr/103071

Posjeta: 879 *