Iodradikaler i Bray-Liebhafsky reaktionen

Kasper Alexander Brauner Hansen, René Møller Madsen, Maria Nicoline Nørr, Jeannie Bøg Rasmussen & Phillip Alexander Thorsted

Student thesis: Termpaper

Abstract

In 1921 a reaction with oscillatory properties was discovered, but to this day there is still no clear agreement on a mechanism for the reaction. Treindl and Noyes published an article in 1993 with their proposal to a mechanism wherein reactions containing radicals were present. In 2010 Schmitz published a different proposal to a mechanism without the radicals. This project seeks to determine whether or not iodide radicals are present during the reaction. In order to do this, acetonitrile, which is a solvent with stabilizing effects on radicals, was added to the reaction during the oscillatory period, which showed suppressions of the oscillations. The experiment was done again, but with methanol as a substitute for acetonitrile. Methanol has no effect on the radicals, but possesses the same macroscopic properties as acetonitrile. The experiment with methanol also showed suppression of the oscillations. Due to the similarities in the results, the presence of iodine radicals during the reaction cannot be proven, since the macroscopic effect can suppress the oscillations on its own.

EducationsChemistry, (Bachelor/Graduate Programme) Undergraduate or graduate
LanguageDanish
Publication date15 Jan 2016
SupervisorsJohn Mortensen

Keywords

  • Iodradikaler i Bray-Liebhafsky reaktionen
  • Bray
  • Oscillerende
  • Liebhafsky
  • Iodradikaler
  • Oscilleringer
  • Bray-Liebhafsky