COMEDK · Chemistry · 4. Chemical Bonding and Molecular Structure
Which one of the following is most stable?
- A \(\mathrm{CH}_3 \mathrm{CH}_2^{-}\)
- B \(\mathrm{HC} \equiv \mathrm{C}^{-}\)
- C \(\mathrm{CH}_3^{-}\)
- D \(\left(\mathrm{CH}_3\right)_3 \mathrm{C}^{-}\)
Answer & Solution
Correct Answer
(B) \(\mathrm{HC} \equiv \mathrm{C}^{-}\)
Step-by-step Solution
Detailed explanation
Due to greater electronegativity of \(s p\)-hybridised carbon, - ve charge on \(\mathrm{HC} \equiv \mathrm{C}^{-}\)is most stable. The stability of other carbanions decreases as the \(+I\) effect of the alkyl groups increases. Thus,…
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