tetrahydrofuran वाक्य
उदाहरण वाक्य
मोबाइल
- Tetrahydrofuran ( THF ) at reflux is the most commonly employed solvent system, but photodissociation conditions at low temperature may also be used.
- In the case tetrahydrofuran, the oxygen atom can act as a hydrogen bond acceptor; where as dichloromethane cannot form hydrogen bonds with water.
- It is sold as a solution in methanol, ethanol, tetrahydrofuran, or water, or as the anhydrous gas in pressurized metal containers.
- After several dissolutions dichloromethane / acetone and precipitations with tetrahydrofuran, a colorless solid is obtained, which is stable under air and moisture sealing.
- Many Grignard reagents such as methylmagnesium bromide, methylmagnesium chloride, phenylmagnesium bromide, and allylmagnesium bromide are available commercially as tetrahydrofuran or diethyl ether solutions.
- In the potassium-nonactin complex, the potassium ion is entirely surrounded by four carbonyl oxygen atoms and the four oxygen atoms of the tetrahydrofuran ring.
- This carbonate ester was cleaved by phenyllithium in tetrahydrofuran at-78 �C to give hydroxybenzoate "'42 "'( Scheme 4 ).
- The synthesis of octaphenylrhodocene proceeds in three steps, with a diglyme reflux followed by workup with hexafluorophosphoric acid, then a sodium amalgam reduction in tetrahydrofuran:
- It is a rouge-colored solid that is soluble in hydrocarbon solvents such as benzene, and more so in tetrahydrofuran or chlorinated solvents such as dichloromethane.
- Vinylic sulfones may be reduced with palladium ( II ) catalysts such as [ Pd ( acac ) 2 ] and Grignard reagents in tetrahydrofuran at room temperature.
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