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We report the synthesis and characterization of two hexapole 7helicenes (H7Hs). Single crystal X-ray diffraction unambiguously confirms the molecular structure. H7H absorbs light, with distinct Cotton effect, from ultraviolet to the near-infrared (λ max = 618 nm). Cyclic voltammetry reveals nine reversible redox states, consecutively from −2 to +6. These chiroptical and electronic properties of H7H are inaccessible from helicene’s small homologues.
Zhu et al. (Wed,) studied this question.