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Dichlorosilane, or DCS as it is commonly known, is a chemical compound with the formula H 2 SiCl 2. In its major use, it is mixed with ammonia (NH 3 ) in LPCVD chambers to grow silicon nitride in semiconductor processing.
The analogous reaction of dimethyldichlorosilane gives siloxane polymers or rings: n (CH 3) 2 SiCl 2 + n H 2 O → [(CH 3) 2 SiO] n + 2n HCl. Many compounds containing Si-Cl bonds can be converted to hydrides using lithium aluminium hydride, This kind of conversion was demonstrated for the preparation of silane: SiCl 4 + LiAlH 4 → SiH 4 ...
The mechanism of the direct synthesis is not known. However, the copper catalyst is essential for the reaction to proceed. In addition to dimethyldichlorosilane, products of this reaction include CH 3 SiCl 3, CH 3 SiHCl 2, and (CH 3) 3 SiCl, which are separated from each other by fractional distillation. The yields and boiling points of these ...
Difluorosilane can be made by fluorinating dichlorosilane with antimony trifluoride. [2] [3] 3 SiH 2 Cl 2 + 2 SbF 3 → 3 SiH 2 F 2 + 2 SbCl 3. Some is also made in a reaction of silicon tetrafluoride with hydrogen. SiF 4 + 2 H 2 → SiH 2 F 2 + 2 HF. Traces of difluorosilane are made when coal is burnt. [4]
Trichlorosilane is a reagent in the conversion of benzoic acids to toluene derivatives. In the first step of a two-pot reaction, the carboxylic acid is first converted to the trichlosilylbenzyl compound. In the second step, the benzylic silyl derivative is converted to the toluene derivative with base. [7]
This reaction was reported in 1921 by the German chemists Lothar Woehler (1870–1952) and Friedrich Mueller. In 1923, German chemists Alfred Stock (1876–1946) and Friedrich Zeidler (1855–1931) found the (SiH) x polymer is formed along with silane gas by the action of sodium amalgam on dichlorosilane (SiH 2 Cl 2 ).
By exploiting this reaction, polysiloxanes have been used as preceramic polymers in various processes including additive manufacturing. Polyvinyl siloxane (vinyl polysiloxane) is used to make dental impressions and industrial impressions. The use of a poly-siloxane precursor in polymer derived ceramics allows the formation of ceramic bodies ...
Alfred Stock and Carl Somiesky examined the hydrolysis of dichlorosilane, a reaction that was proposed to initially give the monomer H 2 SiO: + + When the hydrolysis is performed by treating a solution of H 2 SiCl 2 in benzene with water, the product was determined to have the approximate formula [H 2 SiO] 6. Higher polymers were proposed to ...