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In the mechanism of Hoffmann reaction wh...

In the mechanism of Hoffmann reaction which intermediate rearranges to alkyl isocyanate ?

A

Bromamide

B

Nitrene

C

Nitroso

D

Amide

Text Solution

Verified by Experts

The correct Answer is:
b
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Knowledge Check

  • Assertion : When acetamide reacts with NaOH and Br_(2) , methyl amine is formed. Reason : The reaction occurs through intermediate formation of isocyanate.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • in which of the following reaction carbene is intermediate

    A
    I,II
    B
    II,III
    C
    III,I
    D
    I,II,III

  • In the Hoffmann Bromamide rearrangement, intermediate species are

    A
    R-CO-NHBr
    B
    `[R-CO overset(Theta)(N)-Br]Na^(+)`
    C
    R-N=C=O
    D
    All

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    Whenever an intermediate carbocation is formed in reaction it may rearranges. Only those carbocation will rearrange which can produce more stable species . It can be done either by : (i) Shifting of H, alkyl , aryl, bond (1,2-shifting ) (ii) Ring expansion (iii) Ring contraction Most stable rearranged carbocation is is

    Which of the following reaction involve rearrangement?

    Whenever an intermediate carbocation is formed in reaction it may rearranges. Only those carbocation will rearrange which can produce more stable species . It can be done either by : (i) Shifting of H, alkyl , aryl, bond (1,2-shifting ) (ii) Ring expansion (iii) Ring contraction In which of the following carbocation rearrangement will not take place ?

    In which of the following reactions , the intermediate species acyl nitene (R-oversetoverset(O)(||)C-ddotN: ) and intermediate compound alkyl isocyanate (R-N=C=O) are involved ?

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