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Tardigrade
Question
Chemistry
Among the following carbocations: Ph2 C+CH2 Me (I), ph CH2 CH2 CH+ Ph (II), Ph2 CHCH+M (III)and Ph2 C (Me)CH+2 (IV), the order of stability is
Q. Among the following carbocations :
P
h
2
C
+
C
H
2
M
e
(
I
)
,
p
h
C
H
2
C
H
2
C
H
+
P
h
(
II
)
,
P
h
2
C
H
C
H
+
M
(
III
)
and
P
h
2
C
(
M
e
)
C
H
2
+
(
I
V
)
,
the order of stability is
5483
183
WBJEE
WBJEE 2012
Organic Chemistry – Some Basic Principles and Techniques
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A
IV > II > I > III
10%
B
I > II > III > IV
57%
C
II > I > IV > III
15%
D
I > IV > III > II
19%
Solution:
The order of stability of carbocation is
3
∘
benzylic
>
2
∘
benzylic
>
2
∘
>
1
∘
. Thus, the correct order of stability will be
