Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI

În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului.

 
       
         
    STUDIA CHEMIA - Ediţia nr.1-2 din 1998  
         
  Articol:   A KINETIC STUDY UPON THE OXIDATION OF BENZALDEHYDE BY CERIUM(IV) IN SULFURIC ACID MEDIA.

Autori:  CLAUDIA MUREŞANU, IOAN BÂLDEA, ANA-MARIA BUDUŞAN.
 
       
         
  Rezumat:  The kinetics of benzaldehyde oxidation to benzoic acid by ceric sulfate has been studied using spectrophotometrical means, in a H2SO4 Na2SO4 NaClO4 mixture. The influence of organic substrate, hydrogen ion and sulfate ion concentration as well as the effect of ionic strength upon the rate was investigated over a wide range. The kinetic study revealed the existence of two stages, each of first-order with respect to Cerium(IV). The first step involves the formation of an intermediate complex between Ce(IV) and benzaldehyde. The second step consists of the electron transfer within this 1:1 Ce(IV):benzaldehyde complex. The rate laws for both processes were found and a mechanism was suggested in accordance with the experimental results. The activation parameters for both processes were obtained.  
         
     
         
         
      Revenire la pagina precedentă