Homoatomic anionic rearrangements

Both of these are examples of heteroatomic anionic rearrangements, that is, ones where X and Y are different. Homoatomic anionic rearrangements, where X = Y, are also possible. The one example known before the discovery of organometallic migrating groups was the C—C anionic rearrangement (//, S6), reviewed by Grovenstein elsewhere in this volume ... 

Among the other unknown homoatomic 1,2-anionic rearrangements, several will be detectable only with great difficulty. For example, in silyl hydroperoxide anions, RjSi—O—0 , silicon may migrate from one... 

Fig. 9. Possible homoatomic 1,2-anionic rearrangements. Undetectable means that observation of the rearrangement would be impossible by product analysis except through isotopic labeling.

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