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Test Index
JEE Main Chemistry Class 11 Organic Chemistry Some Basic Principles and Techniques 1 Questions
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Question : 32
Total: 100
The increasing order of the reactivity of the following halides for the
S
N
1
reaction is
[2017]
C
H
3
|
Cl
(
I
)
C
H
C
H
2
C
H
3
C
H
3
C
H
2
C
H
2
C
l
p
−
H
3
C
O
−
C
6
(
II
)
H
4
(
III
)
−
C
H
2
C
l
(
I
I
I
)
<
(
I
I
)
<
(
I
)
(
I
I
)
<
(
I
)
<
(
I
I
I
)
(
I
)
<
(
I
I
I
)
<
(
I
I
)
(
I
I
)
<
(
I
I
I
)
<
(
I
)
Validate
Solution:
Since
S
N
1
reactions involve the formation of carbocation as intermediate in the rate determining step, more the stability of carbocation higher will be the reactivity of alkyl halides towards
S
N
1
route. Since stability of carbocationsfollows order.
C
H
3
−
C
H
2
−
C
H
2
1
∘
carbocation
<
C
H
3
−
C
H
−
C
H
2
−
C
H
3
2
∘
carbocation
<
p
−
H
3
C
O
−
C
6
H
4
−
C
H
2
Max
.
stable
due
to
+
M
effect
of
−
OCH
3
group
.
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