Radical reactions initiated by chelate complexes of transition metals. X. Catalytic decomposition of α,α′-azobisisobutyronitrile

✍ Scribed by Horanská, V. ;Bartoň, J. ;Maňásek, Z.

• Book ID: 104536553
• Publisher: Wiley (John Wiley & Sons)
• Year: 1972
• Tongue: English
• Weight: 496 KB
• Volume: 10
• Category: Article
• ISSN: 0449-296X
• DOI: 10.1002/pol.1972.150100916

✦ Synopsis

Abstract

The decomposition of αα′‐azobisisobutyronitrile (AIBN) in the presence of bis(‐)‐ephedrine copper (II) chelate was studied in 1,3,5‐trimethylbenzene. It was found that the chelate accelerated the decomposition of AIBN and at the same time interacted with the free radicals arising in the course of this process. The decomposition of AIBN as well as the decay of paramagnetic Cu^+2^ particles is a reaction of order 0.3 with respect to the chelate and of order 1.3 and 1.1 with respect to AIBN, respectively. The activation energy of the AIBN decomposition in the presence of chelate is 13–22 kcal/mole for the molar ratio [AIBN]~0~/[Chelate]~0~ ranging from 1 to 100. On the basis of the kinetic results and analysis of reaction products the mechanism of the interaction of chelate with AIBN is discussed.