Consider the following statements about resonance: (I) Canonical structures have no real existence. (II) The resonance hybrid has lower energy than any canonical structure. (III) Resonance involves th

Question

Consider the following statements about resonance: (I) Canonical structures have no real existence. (II) The resonance hybrid has lower energy than any canonical structure. (III) Resonance involves the movement of atoms. Which statement(s) is/are correct?

Prashant Kotian · Accepted Answer

Correct answer: A. Canonical structures are theoretical. The hybrid is the real, most stable structure. Statement III is incorrect because resonance strictly involves the delocalization of pi-electrons or lone pairs, never the movement of atoms.

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