Question

Which of the following statements best describes how resonance forms relate to the actual structure of...

Which of the following statements best describes how resonance forms relate to the actual structure of a molecule or ion?

1- The actual form of a molecule or ion will be a hybrid or averaging of the different relevant resonance forms

2-Molecules and ions with resonance forms will rapidly interconvert between their relevant resonance structures.

3-When a molecule or ion has several relevant resonance structures the forms do not interconvert, but some fraction of all the molecule/ion will be in each resonance form.

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Answer #1

Resonance structures are hypothetical structures which are drawn to explain the electronic structure of a molecule with delocalied electrons. One Lewis structure is not sufficient to express this molecule as shown above for benzene molecule. The actual structure is a hybrid of all structure and each resonance struture contributes to this actual structure based on their stability.

So, the option 1- "The actual form of a molecule or ion will be a hybrid or averaging of the different relevant resonance forms" is the best statement.

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