𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Base-catalyzed oxidation: Kinetics and mechanism of hexacyanoferrate (III) oxidation of methyl cellulose polysaccharide in alkaline solutions

✍ Scribed by R.M. Hassan; S.M. Ibrahim; I.A. Zaafarany; A. Fawzy; H.D. Takagi

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
407 KB
Volume
344
Category
Article
ISSN
1381-1169

No coin nor oath required. For personal study only.

✦ Synopsis

The kinetics of oxidation of methyl cellulose polysaccharide as a natural polymer by alkaline potassium ferricyanide at a constant ionic strength of 1.0 mol dm -3 have been studied, spectrophotometrically. The experimental results showed complex kinetics where the pseudo first-order plots were found to be straight lines up to 60% of reaction completion, and then deviated from linearity. A first-order dependence in Fe(CN) 6

3-and fractional first-order kinetics with respect to the methyl cellulose concentration was observed. The oxidation reaction was found to be base catalyzed. Again, addition of Fe(CN) 6 4-product to the reaction mixture leads to a remarkable retardation of the oxidation rates. A kinetic evidence for the formation of 1:1 intermediate complex was revealed. The activation parameters have been evaluated and a tentative reaction mechanism in good consistency with the kinetic results is discussed.

πŸ“œ SIMILAR VOLUMES

Kinetics and mechanism of Os(VIII)-catal
Kinetics and mechanism of Os(VIII)-catalyzed hexacyanoferrate(III) oxidation of Ξ± amino acids in alkaline medium
✍ R. C. Acharya; N. K. Saran; S. R. Rao; M. N. Das πŸ“‚ Article πŸ“… 1982 πŸ› John Wiley and Sons 🌐 English βš– 406 KB

## Abstract The kinetics of the Os(VIII)‐catalyzed oxidation of glycine, alanine, valine, phenylalanine, isoleucine, lycine, and glutamic acid by alkaline hexacyanoferrate(III) reveal that these reactions are zero order in hexacyanoferrate(III) and first order in Os(VIII). The order in amino acid a

Kinetics and mechanism of the oxidation
Kinetics and mechanism of the oxidation of butane-2,3-diol by alkaline hexacyanoferrate (III), catalyzed by ruthenium trichloride
✍ A. Mucientes Balado; F. Santiago Jimenez; F. J. Poblete MartΓ­n; R. VarΓ³n Castell πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 143 KB πŸ‘ 2 views

with respect to the catalyst concentration is first. The reaction mechanism supposes the formation of a complex between the substrate and the catalyst active form . Subsequently, the complex thus formed slowly decomposes in the rate determining step to give carbonium ions and ruthenium hydride, sinc

Kinetics and mechanism of palladium (II)
Kinetics and mechanism of palladium (II) chloride catalyzed oxidation of allyl alcohol by potassium hexacyanoferrate (III)
✍ Iftikhar Ahmad; C. Muhammad ashraf πŸ“‚ Article πŸ“… 1979 πŸ› John Wiley and Sons 🌐 English βš– 243 KB πŸ‘ 1 views

## Abstract A kinetic study of the oxidation of allyl alcohol by potassium hexacyanoferrate (III) in the presence of palladium (II) chloride is reported. The reaction was observed by measuring the disappearance of the potassium hexacyanoferrate (III) spectrophotometrically. The reaction is first or

Kinetics and mechanism of osmium(VIII)-c
Kinetics and mechanism of osmium(VIII)-catalyzed oxidation of D-proline and L(–)-methionine by hexacyanoferrate(III)
✍ Santosh K. Upadhyay πŸ“‚ Article πŸ“… 1983 πŸ› John Wiley and Sons 🌐 English βš– 358 KB πŸ‘ 1 views

The osmium(VII1)-catalyzed oxidation of D-proline and L(-)-methionine by alkaline hexacyanoferrate(II1) has been studied spectrophotometrically. The reactions follow kinetics different from those of the oxidation of many amino acids investigated earlier, being first order in hexacyanoferrate(II1) an