(i) Write
structures of different isomeric amines corresponding to the
molecular formula, C4H11N
(ii) Write
IUPAC names of all the isomers.
(iii) What
type of isomerism is exhibited by different pairs of amines?
(i) Write structures of different isomeric amines corresponding to the molecular formula, C4H11N
(ii) Write IUPAC names of all the isomers.
(iii) What type of isomerism is exhibited by different pairs of amines?
(i), (ii) The structures and their IUPAC names of different
isomeric amines corresponding to the 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 with secondary and
tertiary amines and vice-versa.
(i), (ii) The structures and their IUPAC names of different isomeric amines corresponding to the 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 with secondary and tertiary amines and vice-versa.
