MCQ
Arrange the following compound in their correct of $pK_b$
- A$III\, >\, I\, >\, II\, >\, IV$
- ✓$IV\, >\, II\, >\, I\, >\, III$
- C$II\, >\, IV\, >\, I\, >\, III$
- D$III\, >\, II\, >\, IV\, >\, I$
✓
Answer
Correct option: B.
$IV\, >\, II\, >\, I\, >\, III$
b
$\ell_{\mathrm{P}}$ is part of Aromaticly
$\ell_{\mathrm{P}}$ is part of Aromaticly
$\therefore $ Less basic $\ell \mathrm{p}$ in Resonance
Reso $.$ Less Reso $.$ More $\therefore $ most basic
$\mathrm{IV}>\mathrm{II}>\mathrm{I}>\mathrm{III} \leftarrow pk_b$
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