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Standard XII
Chemistry
Curtius and Hofmann Rearrangements
How primary a...
Question
How primary amine is prepared by Hoffmann bromamide degradation reaction? Write equation.
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Solution
Amides on treatment with bromine in an aqueous solution of sodium hydroxide forms primary amine.
R
−
O
|
|
C
−
N
H
2
+
B
r
2
+
4
N
a
O
H
→
R
−
N
H
2
+
N
a
2
C
O
3
+
2
N
a
B
r
+
2
H
2
O
.
The product (amine) has one carbon atom less than starting material (amide).
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Q.
Explain Hoffmann bromamide degradation reaction and write the general equation for reaction involved.
Q.
Write the chemical equations involved in the following reactions:
(i) Hoffmann-bromamide degradation reaction.
(ii) Carbylamine reaction.
Q.
Hoffmann bromamide degradation reaction is shown by
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