MCQ
Among the following amines, the strongest Bronsted base is __________.
  • A
  • B
    $\mathrm{NH_3}$
  • C

Answer

Correct option: D.
Aniline is weaker base than $NH_3$ due to delocalization of lone pair of electrons on the N-atom into the benzene ring. Pyrrole (c) is not at all basic because the lone pair of electrons on N-atom is donated towards aromatic sextet formation. Therefore, pyrrolidine (d) has a strong tendency to accept a proton and is hence, the strongest base.

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