BHU PMT BHU PMT (Mains) Solved Paper-2009

  • question_answer
    The least stable free radical is

    A) \[C{{H}_{3}}CHCH{{(C{{H}_{3}})}_{2}}\]

    B) \[C{{H}_{2}}C{{H}_{2}}CH{{(C{{H}_{3}})}_{2}}\]

    C)  \[C{{H}_{3}}\]

    D)  \[C{{H}_{3}}C{{H}_{2}}C{{(C{{H}_{3}})}_{2}}\]

    Correct Answer: C

    Solution :

                     As the number of alkyl groups attached to the carbon containing odd electron increases, number   of   hyper conjugative   structures increases, and thus, the stability increases. \[C{{H}_{3}}\]due to lack of alkyl group, attached to the\[{}^\circ C,\]is least stable.


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