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Aliphatic Substitution and Single Electron Transfer

The discussion so far has considered only heterolytic processes for substitution reactions, but there is increasing evidence that substitutions may take place by a single electron shift synchronous with bond displacement or by a single electron transfer (SET) pathway in which electron transfer precedes bond displacement. To understand the basis of this theory, it is useful to discuss a conceptual model for organic reactions that has been called the valence bond configuration mixing (VBCM) model. As described by [Pg.513]

TABLE 8.17 Values of Nf (Sf) for Selected Leaving Groups and Solvents  [Pg.513]

Energy diagrams for homolytic and heterolytic dissociation (a) gas phase and (b) solution. (Reproduced from reference 148.) [Pg.514]

Pross and Shaik, the method is based on an analysis of the energies of all possible valence bond configurations of the reactants and products as a function of the reaction coordinate. [Pg.514]

Electronically excited states are discussed in Chapter 12. Such awided crossings are discussed in Chapter 11. [Pg.514]


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