Q. Amongst the following, the strongest base in aqueous medium is _____________ .
Amines
Solution:
Compound
Factors responsible for basic character are
a
$CH_3 - NH_2$
Inductive effect (+I)
b
$NC - CH_2 - NH_2$
Inductive effect (-I)
c
$(CH_3)_2NH$
-I effect and resonance
Since, $+I$ effect and solvation increases basic character but $-I$ effect and resonance decreases basic character. Hence, correct choice is (c)
| Compound | Factors responsible for basic character are | ||
|---|---|---|---|
| a | $CH_3 - NH_2$ | Inductive effect (+I) | |
| b | $NC - CH_2 - NH_2$ | Inductive effect (-I) | |
| c | $(CH_3)_2NH$ | -I effect and resonance | |