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Byju's Answer
Standard XII
Chemistry
Grignard Reagent for Alkenes
Which one of ...
Question
Which one of the following reagents is useful in converting 1-butanol to 1-bromobutane?
A
C
H
B
r
3
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B
B
r
2
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C
C
H
3
B
r
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D
P
B
r
3
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Solution
The correct option is
A
P
B
r
3
3
C
H
3
C
H
2
C
H
2
C
H
2
−
O
H
P
B
r
3
−
−−
→
3
C
H
3
C
H
2
C
H
2
C
H
2
−
B
r
+
H
3
P
O
3
Option D is correct.
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Similar questions
Q.
Which, if any, of the following pairs of reagents could be used to prepare 2-phenyl-2-butanol?
Q.
Reaction of R-2-bromobutane with aqueous KOH follows two parallel reactions, one by
S
N
2
(complete inversion) and other by
S
N
1
(complete racemization). Specific optical activity for R-2-butanol is
−
13.50
∘
/
g
m
L
per dm length of the polarimeter.
If in a 10 cm tube polarimeter, 10 ml of R-2-bromobutane along with KOH is filled, then after complete reaction of R-2-bromobutane, the mass of all alcohols formed is found equal to 5 g of which 1 g is of R-2-butanol. Then, the total optical rotation (in degree) of the solution is
Q.
Which statement is correct for the conversion of
R
O
H
to
R
X
by reagents
(
A
)
(
S
O
C
l
2
,
P
B
r
3
P
C
l
3
P
l
3
,
T
s
C
l
)
compared to using
H
X
?
Q.
Which statement is correct for the conversion of ROH to RX by reagents
(
S
O
C
l
2
,
P
B
r
3
,
P
C
l
3
,
P
I
3
)
and TsCl compared to using HX?
Q.
Which statement is correct for the conversion of
R
O
H
to
R
X
by reagents
A
(
S
O
C
l
2
,
P
B
r
3
,
P
C
l
3
and
P
I
3
)
compared to using
H
X
?
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