1. Tardigrade
  2. Question
  3. Chemistry
  4. Most stable carbanion is:

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Q. Most stable carbanion is:

BHUBHU 2003

Solution:

Electron donating groups (e.g., $R)$ increases the electron density and thus make carbanion unstable. Electron withdrawing groups (e.g., $- NO _{2}$ ) take away the electrons and thus stabilises the carbanion.
$CH _{3}^{-}$and $CH _{3} \overset{-}{C}H _{2}$ and
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are unstable due presence of electron withdrawing alkyl group
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is stabilised by electron withdrawing effect of $NO _{2}$ group.