Functional Group Transformation of Chlorosilanes

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. 

A 1-L three-necked round-bottomed flask, a magnetic stirrer, a dropping funnel, a reflux condenser, a separating funnel, a rotary evaporator, and a distillation apparatus under reduced pressure. 

Lithium aluminum hydride, diethyl ether, dichlorodiphenylsi-lane, hydrochloric acid. 

To lithium aluminum hydride (9.75 g, 0.257 mol) in diethyl ether (250 mL) was added dichlorodiphenylsilane (127 g, 0.502 mol). The mixture was heated at reflux for 1 h and then hydrolyzed with dilute hydrochloric acid. The ether layer was separated and evaporated. The residue was distilled to give diphenylsilane (62 g, 67%) as a colorless liquid. Bp 75—76°C/0.5 mmHg. 

The waste containing hydrochloric acid was neutralized with saturated aqueous sodium hydrogen carbonate. Evaporated solvents and distillation waste were stored in a plastic container and treated at the chemical waste disposal facility of a university. 

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