English
Karnataka Board PUCPUC Science 2nd PUC Class 12

Hoffmann Bromamide Degradation reaction is shown by ______.

Advertisements
Advertisements

Question

Hoffmann Bromamide Degradation reaction is shown by ______.

Options

  • \[\ce{ArNH2}\]

  • \[\ce{ArCONH2}\]

  • \[\ce{ArNO2}\]

  • \[\ce{ArCH2NH2}\]

MCQ
Fill in the Blanks
Advertisements

Solution

Hoffmann Bromamide Degradation reaction is shown by \[\ce{ArCONH2}\].

Explanation:

Hoffmann invented a method for producing primary amines by treating an amide with bromine in an aqueous or ethanolic sodium hydroxide solution. An alkyl or aryl group migrates from the amide's carbonyl carbon to the nitrogen atom during this degradation reaction.

\[\ce{C4H5CONH2 ->[Br2 + NaOH] C4H5NH2}\]

shaalaa.com
  Is there an error in this question or solution?
Chapter 13: Amines - Multiple Choice Questions (Type - I) [Page 182]

APPEARS IN

NCERT Exemplar Chemistry Exemplar [English] Class 12
Chapter 13 Amines
Multiple Choice Questions (Type - I) | Q 12 | Page 182

RELATED QUESTIONS

How are propan-1-amine and propan-2-amine prepared from oxime?


Write the chemical equation involved in the following reaction:

Hoffmann-bromamide degradation reaction


Answer in one sentence.

Predict the product of the following reaction.

\[\ce{Nitrobenzene ->[Sn/conc.HCl]?}\]


Answer the following

Explain Gabriel phthalimide synthesis.


Write reactions for the preparation of ethanamine using Gabriel phthalimide synthesis.


Identify compound 'B' in following series of reactions?

\[\ce{Acetonitrile ->[Na/alcohol] A ->[NaNO2/dil.HCI] B}\]


Identify the product 'A' in the following reaction.

\[\ce{Aniline ->[(CH3CO)2O][Pyridine] A}\]


____________ can be prepared exclusively by Gabriel phthalimide synthesis.


The reduction of alkyl cyanide with sodium and ethanol to give primary amines is, ____________.


In aqueous phase the order of basic strength of alkylamine is ______.


Identify product B in the following reaction.

\[\ce{Aniline ->[NaNO2][HCl] A ->[KI] B}\]


Amongst the following, the strongest base in aqueous medium is ______.


The source of nitrogen in Gabriel synthesis of amines is ______.


Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is ______.


Assertion: Hoffmann’s bromamide reaction is given by primary amines.

Reason: Primary amines are more basic than secondary amines.


Which of the following reactions will not give a primary amine?


C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by:-


Identify the product ‘C’ in the following reaction.

\[\ce{Aniline ->[(CH3CH)2O][Pyridine] A ->[Br2][CH3COOH] B ->[H^+ or OH^-] C}\]


Identify the compo ds A and B in the following reactions:

\[\ce{A ->[Nitrating mixture] B ->[(i) Sn/cone. HCI][(ii) NaOH] Aniline}\]


Write a short note on the following:

Ammonolysis.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×