19. Diastereoselective Ion Pairing of TRISPHAT Anions and Tris(4,4′-dimethyl-2,2′-bipyridine)iron(II)
    Jérôme Lacour, Jonathan J. Jodry, Catherine Ginglinger, Sonya Torche-Haldimann
    Angew. Chem. Int. Ed. 1998, 37, 2379-2380

Two configurationally stable, chiral anions (TRISPHAT, 1) behave as efficient hosts that control the configuration of a configurationally labile iron(ii) complex as the guest with high diastereoselectivity (>96 % de) upon ion pairing. The diastereoselectivity increases with decreasing solvent polarity.

Link: http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1521-3773(19980918)37:17%3C2379::AID-ANIE2379%3E3.0.CO;2-C/abstract 

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