Application of Chiral Lanthanide-induced Shift Reagents to Optically Active Cations: the Use of Tris3-(trifluoromethylhydroxymethylene)-( + )-camphoratoeuropium(III) to Determine the Enantiomeric Purity of Tris(phenanthroline)ruthenium(II) Dichloride

摘要

In non-polar solvents, chiral europium complexes provide attractive n. m. r. shift reagents to resolve spectra of optically active cations, and, in particular, for tris(phenanthroline)ruthenium dichloride,^1H n. m. r. shift differences of up to 0.7 p.p.m. between isomers easily permit the determination of absolute enantiomeric purity.