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Effect of Solvent on Free Radical Reactions

  • E. T. Denisov

Abstract

Solvent viscosity has a substantial influence on the elementary reactions for which the rates are diffusion-limited. Such reactions include recombination of atoms and reactions between free radicals that have rate constants on the order of 109 or 1010 liter/mole·sec. A decrease in the diffusion coefficient of iodine atoms with increasing viscosity was demonstrated in [422]. Often used to calculate k is the Stokes-Einstein formula D = kT/3πησ, which is substituted into the formula k = 4·10-3πσ D N to give k = 8 R T/3000 η. For atoms, this formula is, strictly speaking, inapplicable, as is evident from Table 96: The product kη/T changes from solvent to solvent instead of remaining constant.

Keywords

Internal Pressure Methyl Ethyl Ketone Free Radical Reaction Peroxy Radical Solvent Viscosity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© IFI/Plenum Data Company 1974

Authors and Affiliations

  • E. T. Denisov
    • 1
  1. 1.Institute of Chemical PhysicsMoscowUSSR

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