Organosilicon clusters

Chapter 37 ORGAISIOSILICON SYNTHESIS FOR CONSTRUCTION OF ORGANOSILICON CLUSTERS... 

Chlorosilanes are the most important functional silicon compounds. As described above, chlorosilanes can be used for silicon—carbon and silicon—silicon bond formation. In addition, chlorosilanes can be converted into other functional silicon compounds, such as hydrosilanes, alkoxysilanes, and aminosi-lanes. Hydrosilanes, alkoxysilanes, and aminosilanes can be transformed furthermore into other functional silicon compounds. Combination of functional group transformation and silicon-carbon and silicon—silicon bond formation of chlorosilanes are essential for the construction of organosilicon clusters. 

Organosilicon clusters, such as tetrasilatetrahedranes (46,47), hex-asilaprismanes (48,49), and octasilacubanes (50—53) were synthesized by Wurtz-type coupling of mono-, di-, tri-, and tetrasilanes. These precursors were synthesized by silicon—carbon and silicon-silicon bond formation and functional group transformation. 

The synthetic route to 10 is summarized in Scheme 37.3. This organosilicon cluster was synthesized in 10 steps. The first five steps are the same as those in Scheme 37.2. Bromination of dihy-drotetrasilane has already been explained above (Eq. (37.22)). The remaining four steps are described in this section. 

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