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AP Chemistry
2.6 Resonance and Formal Charge
2.2 Intramolecular Force and Potential Energy
IntermediateMCQConceptualExperimental15.8k
A diagram showing two structural models of benzene, C6H6, side by side. Model 1 is labeled Model 1 and shows a hexagonal ring of six carbon atoms with alternating single and double carbon-carbon bonds (three C-C single bonds and three C=C double bonds), with one H atom bonded to each carbon atom. Model 2 is labeled Model 2 and shows a hexagonal ring of six carbon atoms with a dashed interior ring representing delocalized electron density across six equal carbon-carbon bonds, with one H atom bonded to each carbon atom. No other text or annotations appear.
Two proposed structural models for benzene, \(\text{C}_6\text{H}_6\).
A student compares two structural models for benzene, \(\text{C}_6\text{H}_6\), as shown in the diagram: Model 1 with localized alternating single and double carbon-carbon bonds, and Model 2 with a delocalized resonance hybrid. Which of the following experimental observations provides the best evidence supporting Model 2 over Model 1?

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