question_answer 114)

  Which of the two structures (A) and (B) given below is more stabilised by resonance? Explain. \[\underset{(A)}{\mathop{C{{H}_{3}}COOH}}\,\]             and                        \[\underset{(B)}{\mathop{C{{H}_{3}}CO\overset{O-}{\mathop{O}}\,}}\,\]

Answer:

    (A) Less stable because charge separation is involved. (B) More stable because it does not involve charge separation and are of equal energy.