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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
Write the structures of the main products of the following reactions:
The correct increasing order of basic strength for the following compounds is ______.
(I)
(II)
(III)
The most reactive amine towards dilute hydrochloric acid is:
Explain why \[\ce{MeNH2}\] is stronger base than \[\ce{MeOH}\]?
Which of the following is most basic?
By the presence of a halogen atom in the ring, what is the effect of this on basic property of aniline?
What is the correct decreasing order of the basic character of the three amines and ammonia?
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?
State one reason for the following:
Alkylamine is soluble in water, whereas arylamine is insoluble in water.
