Which of the following has maximum stability

MCQ

A
$\mathop C\limits^ + {H_3}$
B
$C{H_3} - \mathop {\mathop {\mathop C\limits_ + }\limits^| }\limits^H - H$
C
$C{H_3} - \mathop {\mathop {\mathop C\limits_ + }\limits^| }\limits^H - C{H_3}$
✓
$\begin{array}{*{20}{c}}
{\,\,\,\,\,C{H_3}} \\
| \\
{\mathop {C{H_3} - C - C{H_3}}\limits_ + }
\end{array}$

✓

Answer

Correct option: D.

$\begin{array}{*{20}{c}}
{\,\,\,\,\,C{H_3}} \\
| \\
{\mathop {C{H_3} - C - C{H_3}}\limits_ + }
\end{array}$

d
Stability of carbonium ion or carbocation depends on the adjacent alkyl groups. Alkyl groups exhibit electron releasing $+ I$ effect and hyperconjugative effect which stabilizes the positive charge. $CH _3^{+}$ methyl carbonium ion does not have both of these effects, therefore it is the least stable.

Therefore $\begin{array}{*{20}{c}} {\,\,\,\,\,C{H_3}} \\ | \\ {\mathop {C{H_3} - C - C{H_3}}\limits_ + } \end{array}$ have maximum stability.

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