A) \[1{}^\circ <2{}^\circ <3{}^\circ <\overset{+}{\mathop{C{{H}_{3}}}}\,\]
B) \[\overset{+}{\mathop{C{{H}_{3}}}}\,<1{}^\circ <2{}^\circ <3{}^\circ \]
C) \[3{}^\circ <2{}^\circ <1{}^\circ <\overset{+}{\mathop{C{{H}_{3}}}}\,\]
D) \[2{}^\circ <3{}^\circ <1{}^\circ <\overset{+}{\mathop{C{{H}_{3}}}}\,\]
Correct Answer: B
Solution :
More the +I alkyl groups on electron deficient carbon, more stable will be the cabocation. Hence, \[3{}^\circ \]carbocations are more stable. The correct order is: \[3{}^\circ >2{}^\circ >1{}^\circ >\overset{+}{\mathop{C{{H}_{3}}}}\,\]
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