Eu(hfc)<sub>3</sub> is the metalloorganic compound with the formula . It is a structural analogue of Eufod but contains three heptafluoropropylhydroxymethylene)camphorate anions instead of heptafluoro-tert-butyl pentanedionates. It features an octahedral molecular geometry Eu(III) center. Like Eufod, it is used as a chemical shift reagent (CSR), to increase the dispersion of signals in NMR spectra, exploiting its Lewis acidity and paramagnetism.
Both Eufod and Eu(hfc)<sub>3</sub> are chiral, but unlike Eufod, Eu(hfc)<sub>3</sub> exists as a single enantiomer owing to chirality of its camphor-derived ligands. Consequently, Eu(hfc)<sub>3</sub> forms diastereomeric adduct with chiral Lewis bases. In this way, Eu(hfc)<sub>3</sub> can be useful for determining optical purity.
Eu(hfc)<sub>3</sub> forms 1:2 adducts with hard Lewis bases:
This reaction is highly reversible, as required for the complex to serve as a CSR.