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Standard XII
Chemistry
Synthesis of Phenols-I
Which of the ...
Question
Which of the following is true regarding the hydroboration oxidation of alkene?
A
It leads to anti-hydration of alkene and occurs with a regioselectivity opposite to Markovnikovs rule.
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B
It leads to syn-addition (hydration) of alkene and carbocation intermediates are involved.
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C
The H that becomes bonded to the C atom comes from the borane and the OH group from
H
2
O
2
.
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D
The H that becomes bonded to the C atom comes from the borane and the OH group from the solvent
H
2
O
.
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Solution
The correct option is
C
The H that becomes bonded to the C atom comes from the borane and the OH group from
H
2
O
2
.
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Similar questions
Q.
In hydroboration oxidation of alkene,
H
and
O
H
are introduced with a regioselectivity opposite to that of Markonikoff's rule.
Q.
There are three common ways to convert an alkene into alcohol:
(A) acid catalyzed hydration, (B) hydroboration-oxidation and (C) oxymercuration-demarcation. Which of the following statements about these reactions is incorrect?
Q.
Diborane reacts with an alkene
A
to give trialkyl borane as an addition product. The formed product is oxidized to alcohol by
H
2
O
2
in presence of aq.
N
a
O
H
. Which of the following can not be the final product?
Q.
Acid catalysed hydration of alkenes give alcohol according to Markownikoff’s rule. Alcohols are also prepared from alkenes by oxy mercuration-de mercuration and hydro boration oxidation.
(A) The compound (A) is:
Q.
Consider the addition of
H
B
r
to 3,3-dimethylbut-1-ene as shown below :
Which of the following represents correct mechanistic explanation for the formation of above product?
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