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Methods for Measuring Rate Constants of Radical Reactions

  • E. T. Denisov

Abstract

Atoms and free radicals are extremely active and enter into reaction very quickly with molecules and with each other (stable free radicals represent an exception). Therefore, the concentration of radicals in a system, when they are being formed continuously and reacting, is very small. Direct measurement of radical concentration, for instance by the EPR method, is possible only with specially selected systems and conditions. In the majority of cases, the concentrations of free radicals cannot be measured. This has led to a widespread use of methods that measure the relative rate constants of radical reactions. These methods are based on the ability of radicals to react in parallel, in two or in several directions; i.e., all these methods are, as a matter of fact, different variants of the method of competing reactions. The errors in measuring relative rate constants usually amount to 2 to 5%.

Keywords

Electron Paramagnetic Resonance Radical Reaction Emulsion Polymerization Iodine Atom Stable Free Radical 
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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