JEE Main & Advanced Chemistry GOC Question Bank Organic reactions and their mechanism

  • question_answer Among the following the strongest nucleophile is [AIIMS 2005]

    A) \[{{C}_{2}}{{H}_{5}}SH\]

    B) \[C{{H}_{3}}CO{{O}^{-}}\]

    C) \[C{{H}_{3}}N{{H}_{2}}\]

    D) \[NCCH_{2}^{-}\]

    Correct Answer: A

    Solution :

    Nucleophiles are those substances which can donate a pair of electrons. These can be neutral or negative. The nucleophilic power depends on the tendency of species to donate electrons. This is more, when an electron pushing group (+I group) is present. Among the alkyl groups, those having higher number of C-atoms will push more, hence ethyl > methyl. CH5 + CH2   (-I)

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