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Which of the following is polar aprotic ...

Which of the following is polar aprotic solvent ?

A

DMSO

B

Crown ether:

C

DMG

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
D
Polar Aprotic Solvents : Aprotic solvents are those solvents whose molecules do not have a hydrogen atom that is attached to an atom of an electronegative element. A number of polar aprotic solvents have come into wide use by chemists because they are especially useful in `S_(N^2)` reactions. Several examples are the following:

All of these solvents (DMF, DMSO, DMA, and HMPA) dissolve ionic compounds, and they solvate cations very well. They do so in the same way that protic solvents solvate cations : by orienting their negative ends around the cation and by donating unshared electron pairs to vacant orbitals of the cation:
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