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    STUDIA CHEMIA - Issue no. 3 / 2007  
         
  Article:   OXIDATION OF DL-METHIONINE (2-AMINO-4-METHYLTHIOBUTANOIC ACID) BY CHROMATE. MECHANISTIC INTERPRETATION ON THE BASE OF AN ONE-PLUS RATE EQUATION.

Authors:  ALEXANDRA CSAVDÁRI, IOAN BÂLDEA, DANA-MARIA SABOU.
 
       
         
  Abstract:  The “one-plus” rate equation is an useful tool for interpreting reaction mechanisms. The kinetic study of the oxidation of 2-amino-4-methylthiobutanoic acid (methionine) by chromate has been undertaken. The reaction obeys a “one-plus” rate law. In order to suggest a reaction mechanism, the interference of kinetic along with extra-kinetic proofs was taken into consideration. The reaction starts with a pre-equilibrium to form an intermediate from the substrate and the reactant. This step is followed by the rate determining electron-transfer process. The influence of the organic substrate and hydrogen ion concentrations was deduced from the kinetic data.  
         
     
         
         
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