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Questions And Answer

• Preparation

  Trisilane is a trace product of the reaction between SiH₂ and HCl, a reaction that requires an infrared laser. The laser is positioned on a stainless steel cylindrical cell perpendicular to the mass spectrometer's laser. Trisilane can also be prepared using the Schlesinger method, which involves reacting lithium aluminum hydride with octachloroTrisilane in n-butyl ether. Furthermore, Pauly, Purnell, and Walsh demonstrated in the 1960s that Trisilane thermally decomposes at high temperatures into silane and ethylsilane.;

• Uses

  Trisilane is a flammable and toxic liquid at room temperature and pressure. Its main uses are in the manufacture of semiconductor silicon films and amorphous silicon.;

• Properties

  Colorless liquid; density 0.743 g/mL at 0°C; freezes at –117.4°C; boils at 52.9°C; vapor density 4.15 g/L at atmospheric pressure; decomposes in water; decomposes in carbon tetrachloride. ;

• Description

  Silicon forms a series of hydrides known as silanes, formula SinH2n+2, where n is the number of silicon atoms in the molecule. This general formula for the silicon hydrides is similar to the CnH2n+2 for the alkane class of hydrocarbons. ;

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