ChemicalBook CAS DataBase List TETRAKIS(TRIMETHYLSILOXY)SILANE

TETRAKIS(TRIMETHYLSILOXY)SILANE synthesis

15synthesis methods

Product Name:TETRAKIS(TRIMETHYLSILOXY)SILANE
CAS Number:3555-47-3
Molecular formula:C12H36O4Si5
Molecular Weight:384.84

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Yield: 98.4%

Reaction Conditions:

with tetrachlorosilane;trifluorormethanesulfonic acid at -10 - 70; for 7 h;Concentration;Reagent/catalyst;

Steps:

2 Example 2
In a 1L four-necked flask, 1.0 mol (169.9 g) of silicon tetrachloride and4.5 mol (488.7 g) trimethylchlorosilane,After adding 15.0 g of trifluoromethanesulfonic acid, stirring is turned on after the feed is complete.The stirring speed is 120 rpm, and the ice water bath controls the kettle temperature at 0 to -10°C.10 mol (180.0 g) of water was added dropwise within 3 hours. The hydrogen chloride gas produced during the dropwise addition was absorbed by water falling film. After the addition was complete, it was aged at 0-10°C for 2 hours.The temperature was then raised to 60-70°C for 2 hours and the reaction was allowed to cool to room temperature.Transfer the above cooling reaction solution to the pear separatory funnel.Static stratification for 15 minutes to separate the lower aqueous hydrochloric acid phaseTo obtain 471.5 g of crude tetrakis(trimethylsiloxy)silicon,The crude product was washed 4 times with 200 grams of water and then dried with 20 grams of anhydrous sodium sulfate8 hours; finally, the above dried tetrakis(trimethylsiloxy)silicon is distilled,378.6 g of tetrakis(trimethylsiloxy)silicon product are obtained,The product was detected by gas chromatography with a content of 98.2% and a yield of 98.4%.

References:

Jingzhou Jianghan Fine Chemical Co., Ltd.;Hu Jianghua;Qin Chuanjun;Gan Jun;Tang Yan;Chen Shengyun;Gan Shuguan CN107629081, 2018, A Location in patent:Paragraph 0009; 0010; 0011; 0012; 00013; 0014; 0015-0022

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