Question

Why are amines basic in nature? Among dimethylamine (pK$_b$ = 3.27) and diethylamine (pK$_b$ = 3.0), which one is more basic?

Hint:

The basic strength of amines increases with the presence of larger alkyl groups, which exert an electron-donating inductive effect, enhancing the electron density on the nitrogen atom.

Answer 1

Amines exhibit basic properties due to the presence of a lone pair of electrons on the nitrogen atom, which allows them to act as Lewis bases by accepting protons \( (H^+) \). 
Comparatively, a lower \( pK_b \) value indicates a stronger base. 
Therefore, diethylamine \( ( pK_b = 3.0 ) \) is a stronger base than dimethylamine \( ( pK_b = 3.27 ) \).