Silicon—nitrogen bonds hydrogen halides

The formation of Si-N-B bond linkages has mostly been accomplished one of following methods so-called cleavage reactions, in which a silicon-nitrogen bond is cleaved by a covalent halide leading to the formation of some halosilane as a side product and dehydrohalogenation, in which the elements of a hydrogen halide are eliminated [17]. 

You have now seen how enols and enolates react with electrophiles based on hydrogen (deuterium), carbon, halogens, silicon, sulfur, and nitrogen. What remains to be seen is how new carbon-carbon bonds can be formed with alkyl halides and carbonyl compounds in their normal electrophilic mode. These reactions are the subject of Chapters 26-29. We must first look at the ways aromatic compounds react with electrophiles. You will see similarities with the behaviour of enols. 

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