A) \[3{}^\circ >2{}^\circ >1{}^\circ >C{{H}_{3}}\]
B) \[3{}^\circ <2{}^\circ >1{}^\circ <C{{H}_{3}}\]
C) \[3{}^\circ <2{}^\circ >1{}^\circ >C{{H}_{3}}\]
D) \[3{}^\circ <2{}^\circ <1{}^\circ <C{{H}_{3}}\]
Correct Answer: A
Solution :
The stability of carbonium ion increases on increasing\[+I\]effect. Hence, \[^{\oplus }C{{H}_{3}}<C{{H}_{3}}CH_{2}^{\oplus }<C{{H}_{3}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C{{H}^{\oplus }}}}\,<C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{{{C}^{\oplus }}}}}\,\] methyl cation\[<1{}^\circ <2{}^\circ <3{}^\circ \]
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