हिंदी

Explain the following reaction with a suitable example. Hofmann elimination reaction - Chemistry

Advertisements
Advertisements

प्रश्न

Explain the following reaction with a suitable example.

Hofmann elimination reaction

दीर्घउत्तर
Advertisements

उत्तर

  1. When tetraalkylammonium halide is heated with moist silver oxide, it gives quaternary ammonium hydroxide.
  2. Quaternary ammonium hydroxides on strong heating undergo β-elimination to give an alkene. This reaction is called Hofmann elimination.
  3. The least substituted alkene is obtained as a major product (in contrast to Saytzeff elimination).
    e.g. Hofmann elimination reaction of N, N, N-Triethylpropylammonium iodide
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 13: Amines - Long answer questions

APPEARS IN

संबंधित प्रश्न

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


Identify the compounds 'A' and 'B' in the following equation:


Write the chemical equation involved in the following reaction:

Hoffmann-bromamide degradation reaction


An aromatic compound 'A' of molecular formula C7H7ON undergoes a series of reactions as shown below. Write the structures of A, B, C, D and E in the following reactions :


How do you convert the following: C6H5CONH2 to C6H5NH2


Accomplish the following conversion:

Nitrobenzene to benzoic acid


Give the structures of A, B and C in the following reaction:

\[\ce{C6H5NO2 ->[Fe/HCl] A ->[HNO2][273 K] B ->[C6H5OH] C}\]


Write the reaction of aromatic primary amine with nitrous acid.


Write the reaction of aliphatic primary amine with nitrous acid.


Explain the mechanism of action of hydroiodic acid on 3-methylbutan-2-ol.


Arrange the following in the increasing order of their pKvalues:

C6H5NH2, C2H5NH2, C6H5NHCH3


Give the structures of A, B and C in the following reactions :


 Write structures of compounds A and B in each of the following reactions:


The following amines is the product of Gabriel phthalimide synthesis.


Name the process of breaking C-X bond by ammonia in preparation of amines.


Explain Hoffmann’s exhaustive alkylation with suitable reactions.


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


Identify compound 'B' in following series of reactions?

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


The end product C of the following reaction is

\[\ce{C2H5NH2 ->[HNO2] A ->[PCl5] B ->[NH3][Alcohol] C}\]


Which of the following amines exhibits maximum degree of intermolecular hydrogen bonding?


____________ can be prepared exclusively by Gabriel phthalimide synthesis.


What product is formed when \[\ce{R - C ≡ N}\] is hydrolysed?


Which nitrogen containing compound amongst the following would undergo Mendius reduction to furnish primary amine \[\ce{(R - NH2)}\]?


Which of the following reactions is appropriate for converting benzamide to aniline?


Which of the following amines forms a clear solution when treated with benzene sulphonyl chloride and excess of potassium hydroxide?


Identify the INCORRECT statement regarding Hofmann bromamide reaction.


Which of the following compounds is obtained when quaternary ammonium hydroxide is strongly heated?


Which of the following does NOT give carbylamine test?


For producing amines, the reaction of nitro compounds with iron scrap is preferred because:


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


The best reagent for converting, 2-phenylpropanamide into 1- phenylethanamine is ______.


Reduction of aromatic nitro compounds using \[\ce{Fe}\] and \[\ce{HCl}\] gives ______.


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


The reagents that can be used to convert benzenediazonium chloride to benzene are:

(i) \[\ce{SnCl2/HCl}\]

(ii) \[\ce{CH3CH2OH}\]

(iii) \[\ce{H3PO2}\]

(iv) \[\ce{LiAlH4}\]


What is the product when \[\ce{C6H5CH2NH2}\] reacts with \[\ce{HNO2}\]?


Write following conversions:

nitrobenzene `->` acetanilide


How will you carry out the following conversion?


How will you carry out the following conversions?


How will you carry out the following conversions?


Describe Gabriel's phthalimide synthesis. (Give reaction)


Acetamide and ethyl amide can be distinguished by reacting with.


Which of the following compound gives pink colour on reaction with phthalic anhydride in cone. H2SO4 followed by treatment with NaOH?


Which of the following amines can be prepared by Gabriel phthalimide reaction?


Write a short note on the following:

Ammonolysis


Write a short note on the following:

Ammonolysis


Write short note on the following:

Ammonolysis


Write a short note on the following:

Ammonolysis.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×