PENTAMETHYLENEBIS(MAGNESIUM BROMIDE) synthesis
- Product Name:PENTAMETHYLENEBIS(MAGNESIUM BROMIDE)
- CAS Number:23708-48-7
- Molecular formula:C5H10Br2Mg2
- Molecular Weight:278.55
111-24-0
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23708-48-7
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$127.00/100ml
Yield:-
Reaction Conditions:
ethylene dibromide in diethyl ether at 19.4 - 30;Product distribution / selectivity;Heating / reflux;Industry scale;Grignard Reaction;
Steps:
31; 33
3J I g Mg and of 6000 ml of diethyl ether (E?2θ) were loaded into the reactor at room temperature. 22ml of 1 ,2-Dibromoethane was then added to activate the Mg. Within 10 minutes, an exotherm was observed as well with vigorous Et2O reflux and ethylene(CH2=CH2) evolution. The temperature rose from 200C to 300C. The Mg activation resulted in the formation of a hazy solution.[0029] A premixcd solution of 920 g of 1 ,4-dibromopentanc, 457 g of Mc2Si(OMe)2 and2353 ml ether was prepared and added drop wise to the already activated Mg in Et2θ. Thirty minutes after addition, a cloudy reaction mixture was observed which indicated the formation of MgBr(OMe) .salt. The reaction mixture reached a maximum exothermic temperature of 35.0C. At the end of the addition a milky, flowable reaction mixture was observed. Stirring was stopped to observe the phases in the system: the solid phase was readily precipitated.
References:
WO2009/61581,2009,A1 Location in patent:Page/Page column 9-11
111-24-0
399 suppliers
$5.00/5g
23708-48-7
21 suppliers
$127.00/100ml