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प्रश्न
Which of the two structures (A) and (B) given below is more stabilised by resonance? Explain.
\[\ce{\underset{(A)}{CH3COOH}}\] and \[\ce{\underset{(B)}{CH3CO\overset{Θ}{O}}}\]
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उत्तर
Resonating structures are as follows:
| (A) | ![]() |
| (B) | ![]() |
Structure 'B' is more stabilised as it does not involve charge separation.
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![]() |
| (A) |
| (i) | ![]() |
| (ii) | ![]() |
| (iii) | ![]() |
| (iv) | ![]() |
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\[\begin{array}{cc}
\ce{CH2 = CH - C = O}\\
\phantom{.........}|\\
\phantom{.........}\ce{H}
\end{array}\]
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\[\ce{\underset{I}{CH2 = CH - CH = O} <-> \underset{II}{\overset{⊕}{C}H2 - CH = CH - \overset{Θ}{O}}}\]
Assertion (A): Energy of resonance hybrid is equal to the average of energies of all canonical forms.
Reason (R): Resonance hybrid cannot be presented by a single structure.







