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Tardigrade
Question
Chemistry
Which will undergo SN2 reaction fastest among the following halogen compounds?
Q. Which will undergo
S
N
2
reaction fastest among the following halogen compounds?
3654
249
KEAM
KEAM 2012
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A
C
H
3
C
H
2
F
B
C
H
3
C
H
2
C
I
C
C
H
3
C
H
2
B
r
D
C
H
3
C
H
2
I
E
(
C
H
3
)
2
C
H
−
C
I
Solution:
S
N
2
reactions involve the formation of intermediate transition state, thus less hindered alkyl halide readily undergoes
S
N
2
reaction.
Moreover,
C
−
I
bond is less stable than
C
−
B
r
or C-Cl bond, thus alkyl iodides are more reactive as compared to other halides.
Hence,
C
H
3
C
H
2
I
is most reactive towards
S
N
2
reaction.