Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1378389 | Carbohydrate Polymers | 2009 | 7 Pages |
Abstract
The kinetics of formation of the green manganate(VI) intermediate complex formed during the oxidation of pectin polysaccharide (poly galacturonate methyl ester) (PGME) by MnO4- in alkaline solution at pH ⩾ 12 have been studied. The rate law was suggested to be: rate = kobs.[MnO4-]. The reaction was found to be base - catalyzed and fractional second - order in [PGME]. The activation parameters have been evaluated and discussed. A reaction mechanism was suggested according to the experimental data. A new blue hypomanganate(V) coordination polymer intermediate sol was spectrophotometrically detected for the first time for pectin (poly galacturonate methyl ester) oxidation reaction. A further mechanistic presentation was proposed.
Related Topics
Physical Sciences and Engineering
Chemistry
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Authors
Ali Mohamad Shaker, Rafat Mohamad El-Khatib, Lobna Abdel-Mohsen Ebaid Nassr,