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COMEDK2024ChemistryChemical Bonding and Molecular Structure

Which one of the following is most stable?

Options

  1. ACH ₃ CH ₂⁻
  2. BHC C ⁻
  3. CCH ₃⁻
  4. D( CH ₃ )₃ C ⁻

Correct answer

B. HC C ⁻

Step-by-step solution

Due to greater electronegativity of s p -hybridised carbon, - ve charge on HC C ⁻ is most stable. The stability of other carbanions decreases as the +I effect of the alkyl groups increases. Thus, ( CH ₃ )₃ C ⁻ is the least stable.

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