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Paragraph II SN2 reaction is a bimole...

Paragraph II
`S_N2` reaction is a bimolecular reaction which takes place by the formation of transition state. Velocity of the reaction depends on the concentration of the substrate as well as the nucleophile. The reaction is favoured by strong nucleophile, and in the presence of polar aprotic solvent, optically active halides give Walden inversion by `S_N2` mechanism. The presence ofhetro group (atom) at `beta`-C atom,unsaturation at `beta`-C,and`(-overset(O)overset(||)(C)-)` group at `alpha` - C atom favour `S_N2` mechanism.
Allyl halides and benzyl halides give `S_N1` and `S_N2` reactions.Allyl halides also give `S_N2` mechanism. EWG at ortho- and para-positions in benzyl halides favours `S_N1` mechanism, whereas EDG favour `S_N2` mechanism.
In the reaction to [x], [x] is:

A

`C_3H_5Br`

B

C

D

`CH_2=CH_2`

Text Solution

Verified by Experts

The correct Answer is:
C
Neighbouring group participation of (COO-) group, with retention of configuration.
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