Ncert Exercises & Solutions

Which of the following bases is the strongest in an aqueous medium?

1. CH₃NH₂
2. NCCH₂NH₂
3. (CH₃)₂NH
4. C₆H₅NHCH₃

Hint: Inductive effect and solvation effect .

Explanation:

Compounds	Factors responsible for basic character are
CH₃-NH₂	Inductive effect (+ I)
NC-CH₂-NH₂	Inductive effect (- I)
(CH₃)₂NH	Inductive effect (+ I) and Solvation
	- I effect and resonance

Since, + I effect and solvation increases basic character while —I effect and resonance decreases basic character. Hence, the correct option is 3.