Silicon trichloride

ETHYLTRICHLORO- SILANE Ethyl Silicone Trichloride, Ethyl Silicon Trichloride, Trichloroethyl-silane, Trichloroethyl-silicane Flammable Liquid 3 3 0... 

Livingston, R. L., and L. 0. Brockway The Molecular Structures of Dimethyl Silicon Dichloride, Methyl Silicon Trichloride and Trifluoro Silicon chloride. J. Amer. chem. Soc. 66, 94—98 (1944). 

Silicon trichloride. Investigations of Troost and Hautefeuille.— Troost and Hautefeuille were able to completely explore the various parts of the field represented by Fig. 122 for certain silicon compounds, and in particular for silicon trichloride, SiaQ. ... 

At 250 this substance is not formed by the action of tetrachloride vapor, SiCl4, on silicon in return, silicon trichloride vapors are undecomposable at this temperature. 

Systems with unlimited reaction and the principle of maximum work.—A considerable number of chemical reactions are classed in the category of which the formation of sulphuretted hydrogen and the decomposition of silicon trichloride are types. All these reactions give rise to an important observation At tent -peratures indvded between t and r, when the ordy possible reaction is limited by stales of false equiltbriumy and at temperatures between r and 6, where this reaction is unlimited, it is exothermic, so that the principle of maximum work is verified to find the principle of maximum work in default it is necessary to attain temperatures, above 0, where states of veritable equilibrium may be established. 

If a very slow current of silicon tetrachloride, SiCl, is passed over silicon at 1200 in a reverberating furnace, kept quite fixed at this temperature, it is noticed that after a certain time silicon has been carried by apparent volatilization into the moderately warm region of the tube, whose temperature is comprised between 500 and 800. In reality, by the action of the silicon tetrachloride on silioon, there is formed silicon trichloride, Si Cle, volatile at these temperatures, which a sudden cooling would allow to be collected, but which, as we have seen, completely decomposes at temperatures included between 700 and 800 . 

Silicon trichloride. Investigations of Troost and Haute-feuille, 890.—293. Systems with unlimited reaction and the principle of maximum work, 891.—294. Systems with unlimited reaction are not essentially distinct from systems with limited reaction, 891. —295. One may always cool a chemical system sufficiently for it to exist in the state of false equilibrium, 898.-296. False equilibria at very low temperatures. Pictet s researches, 898.—297. The reaction point, 894.—298. Reaction point in the phosphorescence of phosphorus, 896.—299. Analogy of the states of false equilibria with the mechanical equilibria due to friction, 898.—300. The existence of false equilibria in chemical i stems is not exceptional but regular,... 

Silicon tetrachloride. At 300° C. Phenylmercuric chloride, phenyl silicon trichloride. Ladenburg, AnmtXm, 1874, 173, 152. 

Ethyl silicon trichloride, CgHsSiClg, is prepared from silicon ethyl triethyl ester and benzoyl chloride by heating them in a sealed tube at 300° C. ... 

Propyl silicon trichloride is formed by the action of propyl magnesium bromide on silicon tetrachloride, and is a clear, colourless liquid, B.pt. 128° to 125° C. In preparing the chloride all traces of moisture must be absent. It has a penetrating odour and fumes in the air. By allowing the liquid to drop into ice-water, the acid, PrSiO. OH, is obtained, and with anhydrous alcohol the trichloride gives silicon propyl triethyi ester, PrSi(OEt)3. 

Isoamyl silicon trichloride is produced in a similar manner to the above, and is a colourless, transparent, fuming liquid with a penetrating odour. It boils at 46° C. at 9 mm., and has a density of 1 066. Its reactions are the same as the propyl compound. 

Phenyltrimethyisilicane is obtained from phenyl silicon trichloride by interaction with methyl magnesium bromide, and boils at 171 5° to 171 7° C, It is a transparent, highly refractive liquid, with a characteristic odour. 

Diphenyl ethylchlorosilicane is obtained by working up the byproduct, B.pt. above 240° C., in the preparation of phenyiethylsihcon dichloride, which is isolated from phenyl magnesium bromide and ethyl silicon trichloride. It is a colourless liquid, B.pt. 206° to 208° C. at 50 mm. The corresponding methyl compound boils at about 180° to 195° C. 

Phenylethyl silicon dichloride is prepared from ethyl silicon trichloride and phenyl magnesium bromide. It boils at 228° to 282° C. and is a highly refractive liquid, fuming strongly in moist air,... 

Phenyl silicon trichloride.— This compound is made from silicon tetrachloride and mercury diphenyl. The two are heated at 300° C. in sealed tubes and the product fractionally distilled. The trichloride is a colourless liquid, B.pt. 197° to 198° C. it fumes in air and is slowly decomposed in cold water, more rapidly on warming or addition of ammonium hydroxide. It burns with a sooty flame, depositing silica ... 

P"Toiyl silicon trichloride. -Tetrachloro-silicane and mercury di p-tolyl are heated in sealed tubes at 300° to 320° C., when the above compound occurs as a strongly refractive, fuming liquid, B.pt. 21S° to 220° C. It is Ibiind to be decomposed by water, giving a convpound having the a]) )arent composition C H SiOoH, and this when heated at 200° C, seems to be transformed into the oxide, (07117810)20,... 

Benzyl silicon trichloride is produced when benzyl magnesium chloride is allowed to interact with silicon tetrachloride. It is a transparent, strongly fuming liquid, with a powerful odour, density 1 2834, B.pt. 94° to 96° C. at 11 mm,... 

Silicotoluic anhydride is prepared from tolyl silicon trichloride by decomposing it with ammonium hydroxide and heating the product at 200° C. The formula correspomls to ( 7X17810)20, but at a lower temperature it is probably C7H7SiOj,H, the corresponding acid. It has similar properties to the silicobenzoic anhydride. 

Silicobenzoic acid is isolated Irom phenyl silicon trichloride by the action of alcolioi and sul sequently hydriodic acid, Silicobenzoic acid trietkylesier is first obtained, B.pt. 235° C., density 1-0133 at 0° C. and 1-0055 at 10° C. This is completely decomposed by hydriodic acid (B.pt. 127° C.) as follows —... 

Benzyl orthosilicic acid triethylester is isolated from benzyl silicon trichloride by treatment with alcohol. Tt is a colourless oil, B.pt. 170° to 175° C. at 70 mm. ... 

Methyl triethoxy siHcon, 258. a-Naphthyl silicon trichloride, 269. 

Dichloride and Methyl Silicon Trichloride. J. Amer. chem. Soc. 63, 801 (1941). 

---