This analysis reveals a thermal electrocyclic reaction that showcases disrotatory behavior, suggesting implications for traditional aromaticity concepts.
Mauksch and Tsogoeva have recently published an article illustrating how a thermal electrocyclic reaction can proceed with distoratory ring closure, whilst simultaneously also exhibiting 4n electron Möbius-aromatic character. Why is this remarkable? Because the simple Woodward-Hoffmann rules state that a disrotatory thermal electrocyclic reaction should proceed via a Hückel-aromatic 4n+2 electron transition state.
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Henry S. Rzepa (2009) studied this question.
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