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ET and Polar Mechanisms; How Are They Connected?

  • Lennart Eberson
Part of the Reactivity and Structure Concepts in Organic Chemistry book series (REACTIVITY, volume 25)

Abstract

The problem posed in the heading is a fundamental one and thus difficult to answer definitively. Provided the reader has become convinced that there exists such a thing as an outer-sphere ET mechanism (remember that this depends on a definition of outer-sphere ET as occurring via a transition state with maximally 1 kcal mol-1 (4 kJmol-1) of electronic interaction between the reactants) the problem can be given a distinct formulation: Are our elementary reactions — defined as reactions which so far have been formulated with one transition state only — really elementary, or do we have reason to write them in two steps, the initial one being of outer-sphere ET type? A clearcut case, to be discussed in more detail below (see Sect. XI.2.b) is the reaction between benzene and nitronium ion, the archetype of a polar, single transition state step (Fig. 1).

Keywords

Radical Cation Alkyl Halide Polar Mechanism Electrophilic Aromatic Substitution Trityl Chloride 
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

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • Lennart Eberson
    • 1
  1. 1.Chemical CenterUniversity of LundLundSweden

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