Question

The reason for higher pKb value of aniline compared to that of methylamine is
A.the unshared electron pair in nitrogen atom in aniline is in conjugation with benzene ring and therefore it is less available for protonation.
B. the unshared electron pair in nitrogen atom in aniline is not in conjugation with benzene ring and therefore it is less available for protonation.
C. the high Electronegativity of -NH2 group.
D.the steric effect in aniline.

Answer 1

Answer:

The correct option is (A).

Explanation:

This is because the unshared or lone pair of electrons on nitrogen atom in aniline is in conjugation with benzene ring and therefore it is less available for protonation.