Studies on rare earth 1,3-diketonates

The chelates of various rare earths with acetylacetone, benzoylacetone, dibenzoylmethane, 2-thenoyltrifluoroacetone and dithenoylmethane were prepared and some of their physical properties noted. The ultraviolet absorption spectra in various non-aqueous solvents were measured. Absorption measurements in the visible region showed alterations in absorption intensities and resolution in some of the principal bands, depending on the solvent. The infrared spectra were measured and compared with literature data.