Diastereoselectivity an chiral ruthenium complexes of chiraphos monoxide ligands: epimerization, quasiracemates, and Lewis acid catalysis.

Heterobidentate chelating ligands comprising P,O-donor sets produce chiral metal centers when bound to arene-ruthenium complexes. The cymene complex [CyRu(eta2-chelate-P,O)Cl]+ cations are precursors to 16-electron dicationic strong Lewis acids which have potential use in asymmetric catalysis. Sixteen-electron complexes of this type, however, also provide a… (More)