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Effect of the solvent on reduction of azomethine dyes with ketyl radicals and recombination of ketyl radicals

  • A. S. Tatikolov
  • V. I. Sklyarenko
  • V. A. Kuz'min
  • M. A. Al'perovich
Physical Chemistry

Abstract

The rate constants of transfer of a hydrogen atom from ketyl radicals to azomethine dyes (kH) and the rate constants of recombination of ketyl radicals (2kr) in different solvents were measured by the method of pulsed photolysis. The dependences of kH and 2kr on the polarity of the solvent are V-shaped: kH and 2kr are maximum in weakly solvating solvents and in water and are minimum in nucleophilic solvents of medium polarity. This is due to the fact that nucleophilic solvation decreases and electrophilic solvation increases the reactivity of the ketyl radicals.

Keywords

Hydrogen Recombination Hydrogen Atom Photolysis Medium Polarity 
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Copyright information

© Plenum Publishing Corporation 1990

Authors and Affiliations

  • A. S. Tatikolov
    • 1
  • V. I. Sklyarenko
    • 1
  • V. A. Kuz'min
    • 1
  • M. A. Al'perovich
    • 1
  1. 1.N. N. Semenov Institute of Chemical PhysicsAcademy of Sciences of the USSRMoscow

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