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Standard XII
Chemistry
Nucleophilic Substitution in Alkyl Halides
29. Cyclohexa...
Question
29. Cyclohexanone is treated with CH3MgBr followed by hydrolysis gives A . A on reaction with HBr gives B. What is B ?
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Q.
A compound
(
A
)
when treated with one mole of
C
H
3
M
g
B
r
in ether followed by hydrolysis gives product
(
B
)
which upon treatment with conc.
H
2
S
O
4
furnishes a olefin. Reductive ozonolysis of said olefin produces a ketone which gives positive iodoform test. Structure of
A
is:
Q.
The reaction of
C
H
3
M
g
B
r
on dry ice followed by acid hydrolysis gives:
Q.
An organic compound
A
has the molecular formula
C
7
H
6
O
. When
A
is treated with
N
a
O
H
followed by acid hydrolysis, it gives two products
B
and
C
. When
B
is oxidized, it gives
A
, when
A
and
C
are each treated separately with
P
C
l
5
, they give two different products
D
and
E
.
(i) Identify
A
,
B
,
C
,
D
and
E
.
(ii) Give the chemical reaction when
A
is treated with
N
a
O
H
and name the reaction.
Q.
A dichloroderivative
(
A
)
on treating with
K
C
N
followed by acid hydrolysis and heating gives a monobasic acid
(
B
)
along with liberation of
C
O
2
(
B
)
on heating with liquid ammonia followed by treating with
B
r
2
/
K
O
H
gives
(
C
)
which on treating with
N
a
N
O
2
and
H
C
l
at low temperature followed by oxidation gives a monobasic acid
(
D
)
having molecular mass
74
.
C
in the whole process would be:
Q.
Propyl lithium reacts with ethene to give a compound
(
A
)
which on reaction with methanal followed by acidic hydrolysis gives compound
(
B
)
is:
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Standard XII Chemistry
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