7. What type of isomerism is exhibited by different pairs of amines?

a) CH₃-CH₂-CH₂-CH₂-NH₂
Butanamine (primary)

b) Buta-2-amine (sec.)

c) 2-methyl propamine (pri)

d) 2-methylpropan-2-amine (pri)

e) CH₃-CH₂-CH₂-NH-CH₃
N-methylpropanamine (sec.)

f) CH₃-CH₂-NH-CH₂-CH₃
N-ethyl ethanamine (sec.)

(g) N-Methyl propan-2-amine (sec.)

h) N,N Dimethylethanamine (tert)

(iii) The pairs (a) and (b) and (e)and (g) exhibit position isomerism.
The pair (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.