MCQ
The stability order of the following carbocations is
- A$II > IV > III > I$
- B$IV > II > III > I$
- ✓$II > III > I > IV$
- D$I > III > II > IV$
✓
Answer
Correct option: C.
$II > III > I > IV$
c
$\underset{\begin{smallmatrix}
More\, \\
resonating
\\
structure
\end{smallmatrix}}{\mathop{\underset{\downarrow }{\mathop{II}}\,}}\,>\underset{resonance}{\mathop{\underset{\downarrow }{\mathop{III}}\,}}\,>\underset{no\,resonance}{\mathop{\underset{\downarrow }{\mathop{I}}\,}}\,>\underset{\begin{smallmatrix}
anti-aromatic \\
carbocation
\end{smallmatrix}}{\mathop{\underset{\downarrow }{\mathop{IV}}\,}}\,$
$\underset{\begin{smallmatrix}
More\, \\
resonating
\\
structure
\end{smallmatrix}}{\mathop{\underset{\downarrow }{\mathop{II}}\,}}\,>\underset{resonance}{\mathop{\underset{\downarrow }{\mathop{III}}\,}}\,>\underset{no\,resonance}{\mathop{\underset{\downarrow }{\mathop{I}}\,}}\,>\underset{\begin{smallmatrix}
anti-aromatic \\
carbocation
\end{smallmatrix}}{\mathop{\underset{\downarrow }{\mathop{IV}}\,}}\,$
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