Sketch the energy levels found using Hückel theory for butadiene and for cyclobutadiene. Using these Hückel theory results, which of these molecules do you propose to be stable and explain your reasoning (do not use the Hückel rule in your answer).
Added by Michelle O.
Step 1
First, we need to sketch the energy levels for butadiene and cyclobutadiene using Hückel theory. For butadiene, a linear molecule with four π electrons, the energy levels are as follows: there are two degenerate energy levels at the bottom (lowest energy), Show more…
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