Two “Half-Chair” Structures in Controversy: How to Teach the Process of Conformations Interconvert of Cyclohexane
ZHENG Su-Juan, ZHANG Si-Han, ZHANG Kai-Rui, ZHAO Jian-Kun, SHI Yi-Rui, WANG Bai-Quan, PENG Qian**
State Key Laboratory of Elemento-Organic Chemistry and Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, China
Abstract The issue of conformations interconvert in cyclohexane is important in stereochemistry for organic chemistry teaching. Although many Chinese and English textbooks describe that there are five coplanar carbon half-chair conformers in cyclohexane conformations interconvert, this description is lack of theoretical and experimental evidence. We suggest that four coplanar carbon structure should be used to describe the conformation interconvert process of cyclohexane. The four coplanar carbon conformer is not only supported by theoretical calculation, but also conforms to the physicochemical principles of potential energy surface. Unfortunately, only few textbooks use the proper expression at present.
ZHENG Su-Juan, ZHANG Si-Han, ZHANG Kai-Rui, ZHAO Jian-Kun, SHI Yi-Rui, WANG Bai-Quan, PENG Qian. Two “Half-Chair” Structures in Controversy: How to Teach the Process of Conformations Interconvert of Cyclohexane[J]. Chinese Journal of Chemical Education, 2021, 42(18): 130-133.
No references of article
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