Back Cover: Bowl‐Shaped Pentagon‐ and Heptagon‐Embedded Nanographene Containing a Central Pyrrolo[3,2‐ b ]pyrrole Core (Angew. Chem. Int. Ed. 27/2021)

A bowl-shaped nitrogen-doped nanographene composed of a pyrrolo[3,2-b]pyrrole core substituted with six arene rings circularly bonded one another undergoes bowl-to-bowl inversion low barrier. This resembles that an umbrella flipped by the strong wind. The transition state is not planar, but possesses rather twisted, S-shaped conformation Ci symmetry. bowl-inversion mechanism follows quadruple-well potential model, as reported Andrzej L. Sobolewski, Michał K. Cyrański, Daniel T. Gryko, and co-workers in their Research Article on page 14998.