Columnar Organization of Carbo[5]helicene Directed by Peripheral Steric Perturbation.
Takehiro HiraoYudai OnoNaomi KawataTakeharu HainoPublished in: Organic letters (2020)
Three carbo[5]helicenes ([5]CHs) containing benzylmaleimide groups displayed columnar stacked organizations, including dislocated, parallel, and alternating (P)- and (M)-helix molecular arrangements in the solid state. The peripheral benzyl groups resulted in very small steric interactions that are responsible for the formation of columnar stacked arrangements in the crystalline state.