Punjab Medical Punjab - MET Solved Paper-2003

  • question_answer
    The correct order of stability of carbocations, is:

    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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