Q18 / 160 · TS EAMCET 2023 (12 May Shift 2) · Chemistry

Consider the following three resonance structures Figure
The correct order of their stabilities is

  • Correct answer
    A
    II $>$ I $>$ III
  • B
    I $>$ II $>$ III
  • C
    III $>$ I $>$ II
  • D
    III $>$ II $>$ I

Solution

A neutral structure with conjugation is more stable than the charged and unconjugated structures. Thus, II is most stable. Among I and III, I is more stable as it has conjugation of $\pi$-electrons and lone-pair electrons. Thus, the stability order will be II $>$ I $>$ III.

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

Relevant Questions