Which of the following is the least basic amine?

Options

A. Ethylamine
B. Diethylamine
C. Aniline
D. Benzylamine

Answer

C

Explanation

Basicity of amines can be explained on the basis of availability of electron density on N-atom for protonation. Because of the +I effet, alkly group increases the electron density on N-atom in alkyl amines. However, aniline is less basic because phenyl group exerts -I effect, ie, it withdraws electrons.