Methyl trichlorosilane

Methyl trichlorosilane [75-79-6] M 149.5, b 13,7 /101mm, 64.3 /710.8mm, 65.5 /745mm, 66.1 /atm, d 1.263, n 1.4110. If very pure distil before use. Purity checked by Si nmr, 6 in MeCN is 13.14 with respect to Me4Si. Possible contaminants are other silanes which can be removed by fractional distillation through a Stedman column of >72 theoretical plates with total reflux and 0.35% take-off (see p. 441). The apparatus is under N2 at a rate of 12 bubbles/min fed into the line using an Hg manometer to control the pressure. Sensitive to H2O. [J Am Chem Soc 73 4252 7957 J Org Chem 48 3667 7955.]... 

Most SiC deposition systems involve the Si-C-H-Cl chemical combination. Avery commonly used reaction is the decomposition of methyl trichlorosilane (MTS) P CP" ]... 

Beta SiC powder from the decomposition of methyl-trichlorosilane (MTS) in the presence of hydrogen in an argon plasma. Also from the gaseous thermal decomposition of tetramethylsilane, Si(CH3)4, in a flowthrough reactor between 850 and 1500°CP 1 and by the reaction of acetylene and silane. 

The reinforcing fibers are usually CVD SiC or modified aluminum oxide. A common matrix material is SiC deposited by chemical-vapor infiltration (CVI) (see Ch. 5). The CVD reaction is based on the decomposition of methyl-trichlorosilane at 1200°C. Densities approaching 90% are reported.b l Another common matrix material is Si3N4 which is deposited by isothermal CVI using the reaction of ammonia and silicon tetrachloride in hydrogen at 1100-1300°C and a total pressure of 5 torr.l" " ] The energy of fracture of such a composite is considerably higher than that of unreinforced hot-pressed silicon nitride. 

In order to avoid the formation of polysilanes, two of the three chlorides in the phenyl(or methyl)trichlorosilane were alkoxylated and the resultant phenyl(or methyl)dialkoxychlorosilane was reacted with the chloride using Na dispersion. 

METHYL- TRICHLOROSILANE Trichloromethyl-silane Flammable Liquid 3 3 2 W... 

In 1974 Verbeek and Winter44,45 described a related process in which methyl-trichlorosilane reacts with methylamine or ammonia to yield a complex oligomer with a structure approximating to 9.15. This species could be melt-spun to form preceramic fibers which, when cross-linked, were pyrolyzed to amorphous silico-carbo-nitride fibers. The sequence of steps is shown in reaction (12). 

West et al. recently found 8) that dimethyldichlorosilane and methyl-trichlorosilane react with Na/K alloy in the presence of naphthaline in THF to yield bicyclic and cage polysilanes Si7mej2) Si8me14, Si9mei6,... 

Apart from MTDCS, the synthesis yields by-products, such as methyl-trichlorosilane (MTCS), thiophene, bis(methyldichlorosilyl)thiophene. There is also the thermal destruction and polymerisation of chlorothio-phene and MTDCS, which forms carbon, high-boling resinous products, HC1 and hydrogen. 

CH3CI3Si methyl trichlorosilane 75-79-6 8.090E+09 61.680 889 C2H402 acetic acid 64-19-7 5.180E+09 33.300... 

CH3Cl3Si METHYL TRICHLOROSILANE 56.670 2.0066E-01 -1.6721E-04 7.2533E-08... 

The methacryloyloxymethyl alkoxysilanes are easily available starting from methyl trichlorosilane, dimethyl dichlorosilane, or trimethyl chlorosilane (1), respectively (Scheme 1). Photochlorination of these precursor silanes almost exclusively leads to the chloromelhyl silanes. Alkoxylation with methanol or ethanol leads to the chloromethyl(methyl)alkoxysilanes (2). Nucleophilic substitution under phase transfer catalysis conditions and distillative isolation finally yields the methacryloyloxymethylsilanes (3), making the production independent of expensive hydrosilation technology. 

Generic name for compounds of the formula RSiClj of which methyl trichlorosilane, CH3SiCl3 is most important. 

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