Short Answer TypeExplain how does the presence or absence of hydrogen on N of amines affect the modes of their reactions with nitrous acid?
Arrange the isomeric compounds:
(i) Ethyldimethyl amine
(ii) n-butyl amine
(iii) diethyl amine
in order of decreasing boiling point and give reason.
The correct order is II > III > I
(II) is a 1° amine (III) is 2° amine and can associate via intermolecular hydrogen bonding. But 1° amine has two H present at N-atom, therefore, more hydrogen bonding. Hence, (II) has a higher boiling point than (III)
(I) is a 3° amine, there is no H present on N atom, no H-bonding present. Hence, (I) has a lowest boiling point.
Explain the following general order of basicity in aqueous solution:
R2NH > RNH2 > R3N > NH3
Explain the following general order of basicity in aqueous solution:
R3N ,R2NH , RNH2
What will be the basic strength order of these amines in gas phase?
How can you find out whether a given amine is a primary amine? Write the chemical reaction involved in the test you perform.
Long Answer TypeHow can you separate a mixture of primary, secondary and tertiary amines? Write chemical reactions involved in the process.
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