It sure would be a service to all organic students if someone were to create a good, interactive web page that draws from Hens' page and shows using Jmol the smooth transition from chair to chair via half-twist (I was calling this twist-chair) and twist (I was calling this twist-boat) as well as other possibilities (as through a half-chair and boat, perhaps). A nice reference to draw from is
http://pubs.acs.org/doi/abs/10.1021/ed074p813 A Three-Dimensional Energy Surface for the Conformational Inversion of Cyclohexane Nicholas Leventis , Samir B. Hanna and Chariklia Sotiriou-Leventis J. Chem. Educ., 1997, 74 (7), p 813 Publication Date (Web): July 1, 1997 (Article) DOI: 10.1021/ed074p813 Bob
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