Direct observation of enantiomeric rotational isomers using 1H nuclear magnetic resonance spectroscopy

Abstract
The existence of enantiomeric rotational isomers in solutions of certain 5-oxidovinylphenanthridiniums and other sterically hindered molecules has been demonstrated by 1H n.m.r. spectroscopy using tris-[3-(trifluoromethylhydroxymethylene)-(+)-camphorato]europium(III).

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