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Byju's Answer
Standard XII
Chemistry
Reaction with Metals
Among the fol...
Question
Among the following species, the most stable carbonium ion is:
A
C
6
H
5
+
C
H
C
6
H
5
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B
C
6
H
5
+
C
H
2
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C
C
H
3
+
C
H
2
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D
C
6
H
5
C
H
2
+
C
H
2
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Solution
The correct option is
A
C
6
H
5
+
C
H
C
6
H
5
C
6
H
5
+
C
H
C
6
H
5
is the most stable carbonium ion as the positive charge is delocalised over two benzene rings.
Note: Greater is the delocalisation of positive charge, greater is the stability of carbocation.
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Similar questions
Q.
(i)
C
6
H
5
⊕
C
H
2
(ii)
C
6
H
5
C
H
2
⊕
C
H
2
(iii)
C
6
H
5
⊕
C
H
C
H
3
(iv)
C
6
H
5
⊕
C
(
C
H
3
)
2
Stability order of the following carbocations is
Q.
Consider the following carbocations
i:
C
6
H
5
+
C
H
2
ii:
C
6
H
5
C
H
2
+
C
H
2
iii:
C
6
H
5
+
C
H
2
C
H
3
iv:
C
6
H
5
+
C
(
C
H
3
)
2
The correct sequence for the stability of these is:
Q.
Which pair of the following carbonyl compounds can be differentiated by
I
2
/
N
a
O
H
?
Q.
Write a chemical equations for the following conversions:
i)
C
H
3
−
C
H
2
−
C
I
into
C
H
3
−
C
H
2
−
C
H
2
−
N
H
2
ii)
C
6
H
5
−
C
H
2
−
C
I
into
C
6
H
5
−
C
H
2
−
C
H
2
−
N
H
2
Q.
The descending order of stability of the carbonium ions.
C
6
H
5
+
C
H
2
,
p
−
(
C
H
3
O
)
C
6
H
4
+
C
H
2
,
p
−
(
N
O
2
)
C
6
H
4
+
C
H
2
and
p
−
(
C
H
3
)
C
6
H
4
+
C
H
2
is?
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