Through-bond versus through-space conjugation and high-dissymmetry chiroptical switching in proton-responsive [8]helicene bisbenzimidazoles
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We report a novel class of bisbenzimidazole-fused [8]helicenes ([8]HBIs) that integrates a configurationally stable helical scaffold with two proton-responsive benzimidazole units. Three distinct regioisomers, generated through twofold imidization of [8]helice... ...
