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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
Arrange the following in increasing order of their basic strength in aqueous solution:
\[\ce{CH3NH2, (CH3)3N, (CH3)2NH}\]
Write the structures of main products when aniline reacts with the following reagents : HCl
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:
C6H5NH2, C6H5NHCH3, C6H5CH2NH2
Arrange the following in decreasing order of their basic strength:
C6H5NH2, C2H5NH2, (C2H5)2NH2, NH3
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?
A Solution of methyl amine shows which type of property with litmus paper?
Which of the following statement is true about methyl amine?
Which of the following is most basic?
What is the characteristic smell of liquid amines?
Give reasons for the following observation:
pKb of aniline is lower than the m-nitroaniline.
Account for the following:
Arrange the following compounds in the increasing order of their basic strength in aqueous solution: CH3NH2,(CH3)3N,(CH3)2NH
Which of the following compound cannot be produced if 1-propane amine is treated with NaNO2 and HCl?
Among the following, which has the highest value of pKb?
