JEE Main & Advanced Chemistry GOC Question Bank Dipole moment, Resonance and reaction intermediates

  • question_answer Which of the following carbanion is most stable   [NCERT 1983]

    A) Methyl

    B) Primary

    C) Secondary

    D) Tertiary

    Correct Answer: A

    Solution :

      \[\underset{\begin{smallmatrix}  \,\,\,\text{Methyl} \\  \,\text{carbanion} \end{smallmatrix}}{\mathop{CH{{_{3}^{{}}}^{-}}\,\,}}\,>\,\underset{\begin{matrix}    {}  \\    \begin{matrix}    {}  \\    {{1}^{o}}  \\ \end{matrix}  \\ \end{matrix}}{\mathop{R-CH{{_{2}^{{}}}^{-}}\,>}}\,\underset{\,\,\,\,\,\,\,2{}^\circ }{\mathop{R-\underset{R\,\,\,}{\mathop{\underset{|\,\,\,\,}{\mathop{C{{H}^{-}}}}\,}}\,}}\,>\,\underset{\,\,\,\,\,\,\,\,3{}^\circ \,}{\mathop{R-\,\underset{R\,\,}{\overset{R\,\,}{\mathop{\underset{|\,\,\,\,}{\overset{|\,\,\,\,}{\mathop{{{C}^{-}}}}}\,}}}\,}}\,\]

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