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Which will undergo S(N^(2)) reaction fas...

Which will undergo `S_(N^(2))` reaction fastest amont the following halogen compounds

A

`CH_3CH_2F`

B

`CH_3CH_2Cl`

C

`CH_3CH_2Br`

D

`CH_3CH_2I`

Text Solution

Verified by Experts

The correct Answer is:
D
Smaller the R group reactivity will be higher towards `S_N^2` reaction.
Better will be leaving group, faster will be rate. Relative reactivity `{:(F^(-),Cl^(-),B\r^(-),I^(-)),(1,200,10000,20000):}`
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