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प्रश्न
Write a short note on the following:
Carbylamine reaction
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उत्तर
Aliphatic and aromatic primary amines on heating with chloroform and ethanolic potassium hydroxide form isocyanides or carbylamines which are foul smelling substances. Secondary and tertiary amines do not show this reaction. This reaction is known as carbylamine reaction or isocyanide test and is used as a test for primary amines.
\[\ce{R-NH2 + CHCl3 + 3KOH ->[Heat] R-NC + 3KCl + 3H2O}\]
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संबंधित प्रश्न
Write the structures of main products when aniline reacts with the following reagents : HCl
Write the chemical equations involved when aniline is treated with the following reagents: HCI
Why does NH3 act as a Lewis base?
Arrange the following:
In decreasing order of the pKb values:
C2H5NH2, C6H5NHCH3, (C2H5)2NH and C6H5NH2
Arrange the following:
In increasing order of basic strength:
C6H5NH2, C6H5N(CH3)2, (C2H5)2NH and CH3NH2
Arrange the following:
In increasing order of basic strength:
Aniline, p-nitroaniline and p-toluidine
Arrange the following:
In increasing order of basic strength:
C6H5NH2, C6H5NHCH3, C6H5CH2NH2
Write the structures of the main products of the following reactions:
The following reaction takes place in the presence of:
The correct decreasing order of basic strength of the following species is ______.
\[\ce{H2O, NH3, OH-, NH^{-}2}\]
Explain why \[\ce{MeNH2}\] is stronger base than \[\ce{MeOH}\]?
Account for the following:
Acylation of aniline is carried out in the presence of pyridine.
When methyl iodide is heated with ammonia, what is the product obtained?
When ethanol is mixed with ammonia and passed over alumina the compound formed is which compound?
By the presence of a halogen atom in the ring, what is the effect of this on basic property of aniline?
What is the characteristic smell of liquid amines?
