The kinetics of the oxidation of mandelic acid (MA) by permanganate in aqueous alkaline medium at a constant ionic strength of 1.0 mol dm ร3 were studied spectrophotometrically. The reaction shows first-order kinetics in [permanganate ion] and fractional order dependences in [MA] and [alkali]. Addit
A kinetic study of the oxidation of lactic acid by potassium peroxydisulfate-catalysed by Ag+ ions
โ Scribed by N. Venkatasubramanian; A. Sabesan
- Publisher
- Elsevier Science
- Year
- 1966
- Tongue
- French
- Weight
- 147 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
The kinetics and mechanisn of the oxidation of a variety of organic and inorganic substances by potassium peroxydisulfate under uncatalysed conditions and under conditions of catalysis by A& ions have been the subject of investigation by several groups OI workers (l-3). In most of the investigations of the Ae+ catalysed oxidations of organic suhstr-tes, the rate of the reaction at any instant was found to be proportional to the per-oxyt1isulfate concentration and to the (constant) Ag+ ion concentration and to be indeoendent of the concentration of the organic substrate.
๐ SIMILAR VOLUMES
The kinetics of permanganate oxidation of L-phenylalanine in acid medium at a constant ionic strength has been investigated spectrophotometrically. An autocatalytic reaction was observed being autocatalyzed by a soluble form of Mn(1V). The reaction appears to involve a parallel consecutive reaction
The enzyme-catalysed polymerization of lactic acid was tested by HPLC and MALDI-MS methods. A chiral HPLC technique was applied to the investigation of the enantio-selectivity of the reaction. The polymer compounds formed were identified by MALDI-MS.
Aliphatic amino acids are smoothly oxidized by peroxomonophosphoric acid (PMPA) in the pH region 6-10. Kinetic studies reveal second order dependence in the amino acid not observed hitherto in any of the PMPA oxidations. Dependence in PMPA is unity. Rate-pH profile yields a maximum around pH 8. The
## Abstract The oxidation of ฮฑโhydroxy acids and ฮฑโhydroxy ketones by Br(V) follows the rateโlaw However, the former reaction exhibits a secondโorder dependence on hydrogen ion concentration while the latter reaction has a thirdโorder dependence. A mechanism involving a slow formation of a bromate