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TS EAMCET · Chemistry · General Organic Chemistry

Which one of the carbanions is the least stable?

  1. A \(\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_2-\mathrm{NO}_2\)
  2. B \(\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_2-\mathrm{CHO}\)
  3. C \(\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_2-\mathrm{CH}_3\)
  4. D \(\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_3\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_2-\mathrm{CH}_3\)

Step-by-step Solution

Detailed explanation

\(\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_2-\mathrm{CH}_3\),ethyl carbanion is least stable because \(-\mathrm{CH}_3\), (methyl group) is an electron donating group that will increase the electron density on the carbon having - ve charge resulting into decrease in its…