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Byju's Answer
Standard XII
Chemistry
Reactions of Aryl Amines (Diazo Salts)
74 In which o...
Question
74 In which of the following compounds is steric inhibition of resonance effect will operate A. 1,2,3 trimethylbenzene B. 3,5 dimethyl nitroBenzene C. 2,6 dimethyl nitrobenzene D. 2 methyl nitrobenzene
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Q.
Assertion :
2
,
6
−
D
i
m
e
t
h
y
l
−
4
−
n
i
t
r
o
p
h
e
n
o
l
(
I
)
is more acidic than
3
,
5
−
d
i
m
e
t
h
y
l
−
4
−
n
i
t
r
o
p
h
e
n
o
l
(
I
I
)
.
Reason: It is due to the steric inhibition of the resonance of
(
−
N
O
2
)
group with two
(
M
e
)
groups in
(
I
I
)
.
Q.
Assertion :
P
h
N
+
2
B
r
−
couples with N,N-dimethyl aniline (I) but not with 2,6-dimethyl-N,N dimethyl aniline (II). Reason: Due to steric inhibition of resonance, the p-position of (II) is not sufficiently activated for the coupling reaction.
Q.
Energy of the resonance hybrid of nitrobenzene is
E
0
k
J
/
m
o
l
and nitrobenzene has the following resonating structures with their energies given below:
Resonating structure
Energy
E
1
E
2
E
3
E
4
E
5
The correct representation of the resonance energy would be:
Q.
Energy of the resonance hybrid of nitrobenzene is
E
0
k
J
/
m
o
l
and nitrobenzene has the following resonating structures with their energies given below:
Resonating structure
Energy
E
1
E
2
E
3
E
4
E
5
The correct representation of the resonance energy would be:
Q.
Which of the following will best convert nitrobenzene into 3-fluorobromobenzene?
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