Q82 / 180 · JIPMER 2015 · Chemistry

For carbanion Figure Stability order will be

  • A
    $P \gt Q \gt S \gt R$
  • Correct answer
    B
    $P \gt R \gt Q \gt S$
  • C
    $Q \gt R \gt S \gt R$
  • D
    $S \gt R \gt Q \gt P$

Solution

As $-M$ and $-I$-effect increase, stability of carbanion increases. $-M$-effect is possible only at ortho and para-position and $-I$-effect is more pronounced at ortho position. Hence, correct order of stability is Figure

Hence, the correct answer is option: 'B'.

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