A study of “pericyclic reactions” by molecular electron density theory has shown that bonding changes take place sequentially through a non‐concerted symmetric electron density reorganization. The high activation energies of these reactions are associated with the initial rupture of the double bonds. This study has led to the definition of “pericyclic reactions” being ruled out.

中文翻译：

---

周环反应的神秘性：基于电子密度分析的有机反应性的当代合理化

通过分子电子密度理论对“周环反应”的研究表明，键合变化是通过未经证实的对称电子密度重组顺序发生的。这些反应的高活化能与双键的初始断裂有关。这项研究导致排除了“周环反应”的定义。