The rate of S_{N}2 reaction is maximum when t | vedclass

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(C) The rate of $S_{N}2$ reactions is significantly enhanced in polar aprotic solvents. Polar aprotic solvents like $DMSO$ (Dimethyl sulfoxide) do not

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$DMSO$

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(C) The rate of $S_{N}2$ reactions is significantly enhanced in polar aprotic solvents. Polar aprotic solvents like $DMSO$ (Dimethyl sulfoxide) do not form hydrogen bonds with the nucleophile,leaving it 'naked' and more reactive. In contrast,polar protic solvents like $CH_{3}OH$ and $H_{2}O$ solvate the nucleophile through hydrogen bonding,which decreases its nucleophilicity and slows down the $S_{N}2$ reaction.

The rate of $S_{N}2$ reaction is maximum when the solvent is

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