Reflection of the Ion-Radical Step in Reaction Steric Results

3 REFLECTION OF THE ION-RADICAL STEP IN REACTION STERIC RESULTS 

The nature of X in the initial CgHi3C H(Me)X defines the relation between the two routes. If X = Br, the configuration inversion does not exceed 8%. If X = OSOjMe, the inversion takes place up to 25%. The bromide ion is more active in elimination than methyl sulfonate ion. Therefore, the electron-transfer contribution to the substitution reaction is higher. 

It should be noted that nonmetallic redox reactions also experience the sonication influence. The preparation of y lactons from olefines by oxidation of manganese triacetate is an example. 

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