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Amines — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryAmines1 Mark
MCQ
Which of the following is most basic?
  • A
    Diphenylamine
  • B
    Triphenylamine
  • C
    $p -$ Nitroaniline
  • ✓
    Benzylamine
✓

Answer

Correct option: D.
Benzylamine
Benzylamine $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{NH}_2$​ is more basic because benzyl group is electron donating group due to $+I$ effect.
So it is able to increase electron density of $N$ of $-NH_2$​ group.
Thus due to higher electron density rate of donation of a free pair of electron is increased $I.e$ basic character is higher While phenyl and nitro group are electron withdrawing group so they are able to decrease the electron density of $N$ of $−NH_2$​ group. Hence they are less basic.

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