Mechanism of Ruthenium (III) Catalysed Oxidation of L-Valine by Alkaline Hexacyanoferrate (III)

✍ Scribed by Raj Kishor Shukla

• Publisher: Wiley (John Wiley & Sons)
• Year: 2010
• Weight: 35 KB
• Volume: 91
• Category: Article
• ISSN: 0037-9646
• DOI: 10.1002/bscb.198209105110

✦ Synopsis

Abstract

The kinetics of Ruthenium (III) catalysed oxidation of L‐Valine by alkaline solution of hexacyanoferrate (III) were studied by following the rate of disappearance of Fe(CN)^3‐^. The reaction shows zero order dependence on hexacyanoferrate (III). First order on ruthenium (III). The first order kinetics observed at lower concentration of L‐valine tends towards zero order at its higher concentration. The reaction rate decreases gradually with increasing concentration of hydroxide ion. The main oxiding species base, however, been found to be ruthenium (III) and hexanoferrate (III) is merely used up in generating the ruthenium (III) species from ruthenium (II) formed. A suitable reaction mechanicals involving formation of transit complex between ruthenium (III) species and valine has been proposed. Evidence for complex formation is Obtained by Michselismanten reciprocal plot. Thermodynamic parameters have been recorded and the final rate law has been devised. The product as a result of oxidation has been identified and the different properties have been assigned by using the new techniques.