A) \[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{+}{\mathop{C}}}\,-H\]
B) \[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{{{C}^{+}}}}}\,\]
C) \[\overset{+}{\mathop{C}}\,{{H}_{3}}\]
D) \[C{{H}_{3}}\overset{+}{\mathop{C}}\,{{H}_{2}}\]
Correct Answer: B
Solution :
The most stable carbocation is t-alkyl carbocation because the order of stability of alkyl carbocation is \[t-\]alkyl\[>\,\,s-\]alkyl \[>\,\,p-\]alkyl\[>CH_{3}^{+}\]carbocation. This stability is due to the hyperconjugation.
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