The 60 MHz1H NMR spectra of racemic meparfynol,1, have been studied in CDCl3solution at 28° with the achiral shift reagentt tris(6,6,7,7,8,8,8-hepta-fluoro-2,2-dimethyl-3,5-octanedionato) europium (III),2, and the chiral reagent, tris[3-(heptafluoropropyl-hydroxymethylene)-d-camphorat01 europium(III),3. With3, observable enantiomeric shift differences for the 3-methyl should make possible direct optical purity determinations. Additions of increments of (6,6,7,7,8,8,8-heptafluoro-2,2-dimenthyl-3,5-octane-dionato)silver(I)4, to a CDCl3solution of1and3resulted in changes in Δδ magnitudes and in some line intensities that are discussed in terms of interactions with the ethynyl and hydroxyl groups.