Question:

In test for primary amines, the amine is treated with $ {CHCl_3}$ and KOH and a bad smelling compound is formed. If the primary amine used is ethylamine, identify the bad smelling compound formed?

Updated On: Jul 6, 2022
  • $\ce{CH_3CN}$
  • $\ce{CH_3CNO}$
  • $\ce{CH_3 CH_2 NC}$
  • $\ce{CH_3NCO}$
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The Correct Option is C

Solution and Explanation

When ethyl amine reacts with chloroform in the presence of alcoholic potash, then ethylisocynide is formed. This reaction is known as carbyl amine reaction. $ { $\underset{\text{ Ethyl amine}}{ {C_2H_5 - NH_2 }}$ + $\underset{\text{ Chloroform}}{ {CHCl_3 + 3KOH }}$ -> C_2H_5 - NC + 3KCl + 3H_2O }$ Ethyl isocyanide (bad smelling compound)
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Concepts Used:

Amines

Amine is a type of compound which is derived from ammonia (NH3). According to Organic chemistry, they are basically classified as the functional groups of the organic nitrogen compounds that contain nitrogen atoms with a lone pair.

Amine - Types

Primary Amines:

It is formed when one hydrogen atom in ammonia is substituted by an alkyl or aromatic group. Amino acids and methyl amine are the best examples that why aromatic amines include aniline.

Secondary Amines:

Amines that have two organic substitutes either alkyl or aryl ones or both and are bound to the nitrogen together with one hydrogen are termed as secondary amines. For Example, Dimethylamine.

Tertiary Amines:

Tertiary Amines are the amines where the nitrogen consists of three organic substitutes. For example, Trimethylamine and EDTA.