The correct order of acidic nature of the following alkynes is I. $\mathrm{C}_2 \mathrm{H}_2 \quad$ II.…

The correct order of acidic nature of the following alkynes is I. $\mathrm{C}_2 \mathrm{H}_2 \quad$ II. $\quad\left(\mathrm{CH}_3\right)_2 \mathrm{C}_2$ III. $\left(\mathrm{CH}_3\right) \mathrm{C}_2 \mathrm{H}$
  1. I $ < $ III $ < $ II
  2. II $ < $ III $ < $ I
  3. III $ < $ II $ < $ I
  4. II $ < $ I $ < $ III

Solution


Due to the $(+\mathrm{R})$ effect of methyl group the stability of conjugate bases decreases from (III) to (II): $\therefore$ Correct order of acidity : (II) $ < $ (III) $ < $ (I)

Asked in: AP EAMCET 2022 (05 Jul Shift 2)

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