77. Trimesitylmethylphosphonium Cation. Supramolecular Stereocontrol and Simple Enantiomerization Mechanism Determination
    Benoît Laleu, Gérald Bernardinelli, Remi Chauvin, Jérôme Lacour
    J. Org. Chem. 2006, 71, 7412-7416

Stereocontrol over the propeller isomerism of trimesitylmethylphosphonium cation was achieved through an ion pairing with chiral hexacoordinated phosphate anions; the asymmetric ion pairing allowed also a most simple experimental proof of the nature of the enantiomerization pathway in solution (two-ring flip).

DOI : 10.1021/jo061097w 

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