The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary

The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name.

 
       
         
    STUDIA CHEMIA - Issue no. 2%20(Tom%20I%20 / 2010  
         
  Article:   KINETICS OF THE PHENOL OXIDATION BY PERMANGANATE IN ACIDIC MEDIA. THE INTERMEDIATE OXIDIZED SPECIES 4,4’-BIPHENOQUINONE EVOLUTION.

Authors:  LUCIAN COPOLOVICI, IOAN BÂLDEA.
 
       
         
  Abstract:  

The kinetics of phenol oxidation by permanganate has been carried out in relative strong acidic media, in the presence and in absence of manganese (II) as catalyst. Formation of an intermediate colored species that absorbs light at 400 nm has been observed during the course of reaction. Its formation and decay has been followed spectrophotometrically. The intermediate has been assigned as 4,4’-biphenoquinone. Kinetic laws for the formation and consumption of this intermediate have been established. Complicate rate equations of the one-plus form were deduced either for building up or for decomposition of the intermediate. Rate constants, pre-equilibrium constants and experimental activation energies were determined. Some mechanistic considerations were made.

 

Keywords: phenol, permanganate, kinetics, 4,4’-biphenoquinone.

 
         
     
         
         
      Back to previous page