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JIPMER 2015
Exam
JIPMER
Year
2015
Subject
Chemistry
Chapter
General Organic Chemistry

JIPMER 2015 · Chemistry · General Organic Chemistry

For carbanion Stability order will be

For carbanion For carbanion Stability order will be Stability order will be

Options

  1. AP>Q>S>RP \gt Q \gt S \gt R
  2. BP>R>Q>SP \gt R \gt Q \gt S
  3. CQ>R>S>RQ \gt R \gt S \gt R
  4. DS>R>Q>PS \gt R \gt Q \gt P

Correct answer

B. P>R>Q>SP \gt R \gt Q \gt S

Step-by-step solution

As −M-M and −I-I-effect increase, stability of carbanion increases. −M-M-effect is possible only at ortho and para-position and −I-I-effect is more pronounced at ortho position. Hence, correct order of stability is For carbanion Stability order will be
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