Question -
Answer -
(ii) Write IUPAC names of all the isomers.
(iii) What type of isomerism is exhibited by different pairs of amines?
Answer
(i), (ii) Thestructures and their IUPAC names of different isomeric amines corresponding tothe molecular formula, C4H11N are given below:
(a) CH3-CH2-CH2-CH2-NH2
Butanamine (10)
(b) 
Butan-2-amine (10)
(c)
2-Methylpropanamine (10)
(d)
2-Methylpropan-2-amine (10)
(e) CH3-CH2-CH2-NH-CH3
N-Methylpropanamine (20)
(f) CH3-CH2-NH-CH2-CH3
N-Ethylethanamine (20)
(g)
N-Methylpropan-2-amine (20)
(h)
N,N-Dimethylethanamine (3°)
(iii) The pairs (a) and (b) and (e) and (g) exhibit position isomerism.
The pairs (a) and (c); (a) and (d); (b) and (c); (b) and(d) exhibit chain isomerism.
The pairs (e) and (f) and (f) and (g) exhibit metamerism.
All primary amines exhibit functional isomerism withsecondary and tertiary amines and vice-versa.