[7]-Helicene: a chiral molecular tweezer for silver(I) salts.

@article{Fuchter20127HeliceneAC,
  title={[7]-Helicene: a chiral molecular tweezer for silver(I) salts.},
  author={Matthew J. Fuchter and Julia Schaefer and Dilraj K. Judge and Ben Wardzinski and Mark R. Weimar and Ingo Krossing},
  journal={Dalton transactions},
  year={2012},
  volume={41 27},
  pages={
          8238-41
        }
}
We have unambiguously demonstrated the binding of the silver(I) ion in the central cavity of [7]-helicene, given that the counterion is weakly coordinating. In such a binding mode, the helicene is functioning as a chiral molecular tweezer. 
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Contribution to cation–π interaction of the univalent silver cation with racemic [7]helicene in the solid state
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