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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
    • DISHA PUBLICATION-ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES -Exercise - 1 : Concept Builder (Topicwise) TOPIC 3 : Concepts of Reaction Mechanism in Organic Compounds and Purification
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    4. Chlorine in vinyl chloride is less reactive because

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    5. In the following group : -OAc(I),-OMe(II),-OSO(2)(III),-OSO(2)CF(3)(...

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    6. Most stable carbocation is :

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    7. The decreasing order of nucleophilicity among the nucleophiles is : ...

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    8. Decreasing order of reactivitytowards nucleophilic addition to carbon ...

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    9. Select the appropriate relation with repect to acidity of X, Y, Z for ...

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    10. the reaction is not possible because

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    11. Which among the following group when attached to benzene ring will dir...

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    12. In which of the following pairs A is more stable than B ?

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    13. Which of the following has the highest nucleophilicity ?

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    14. The increasing order of the boiling points for the following compound ...

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    15. Which of the following compouns has most acidic hydrogen ?

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    16. Polarization of electrons in acrolein may be written as:

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    17. Identify most acidic hydrogen present in the above compound :

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    18. Of the following compounds, which will have a zero dipole moment ?

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    19. Which statement is incorrect in respect of the above reaction ?

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    20. Carbon-carbon double bond lenghth will be maximum in which of the foll...

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