Advertisements
Advertisements
Question
Write a short note on the following:
Carbylamine reaction
Solution
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.
\[\ce{R-NH2 + CHCl3 + 3KOH ->[Heat] R-NC + 3KCl + 3H2O}\]
APPEARS IN
RELATED QUESTIONS
Arrange the following in increasing order of their basic strength in aqueous solution:
\[\ce{CH3NH2, (CH3)3N, (CH3)2NH}\]
Arrange the following:
Aniline, p-nitroaniline, p-methylaniline - in the increasing order of their basic strength
Write the structures of main products when aniline reacts with the following reagents : HCl
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, C6H5NHCH3, C6H5CH2NH2
Arrange the following:
In decreasing order of basic strength in the gas phase:
C2H5NH2, (C2H5)2NH, (C2H5)3N and NH3
The correct increasing order of basic strength for the following compounds is ______.
(I)
(II)
(III)
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 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 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.
Which of the following compound cannot be produced if 1-propane amine is treated with NaNO2 and HCl?
