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ChemicalBook CAS DataBase List 1,3-Bis(chloromethyl)-1,1,3,3-tetramethyldisiloxane

1,3-Bis(chloromethyl)-1,1,3,3-tetramethyldisiloxane synthesis

11synthesis methods
-

Yield: 95%

Reaction Conditions:

with water at 85; for 1.83333 h;Temperature;

Steps:

1.1; 4.1 The preparation includes the following steps:
Add 70g of deionized water to a four-necked flask equipped with a reflux condenser, a T-shaped three-way piston, a constant pressure dropping funnel, and a rubber stopper, and slowly add chloromethyldimethyl dropwise with a constant pressure dropping funnel Chlorosilane 71.5g (0.5mol), after about 20min dropwise addition, acid mist appeared in the flask, the temperature slightly increased, after stirring hydrolysis reaction at room temperature for 0.5h, after heating and refluxing at 85 ° C for 2h, it was left to stand for separation The lower aqueous layer was washed with water until neutral, dried overnight with anhydrous calcium chloride, filtered, and distilled under reduced pressure to collect fractions near 64 ° C to obtain 1,3- (bischloromethyl) -1,1,3,3-tetra Methyl disiloxane, molar yield 95%, purity 99%.

References:

Shandong University;Zhang Jie;Fan Jinlong;Fu Dangwei CN110759938, 2020, A Location in patent:Paragraph 0048-0053; 0074-0077; 0094-0097

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