Abstract: Tris (3-trifluoroacetyl-d-camphorato) europium (III), E~(facam)~, tris (3- heptafluorobutyryl-d-camphorat0)-europium (III), Eu (hfbc) 3, and the corresponding praseodymium analogs, Pr (facam), and Pr (hfb~)~, are useful nmr shift reagents for direct determination of enantiomeric compositions. These optically active shift reagents are applicable to those classes of compounds that respond to conventional shift reagents ...
