SOME ADDUCTS OF RARE EARTH ACETYLACETONATES

Several previously unreported adducts of rare earth acetylacetonates have been prepared and characterized by chemical analyses (including Karl Fischer titrations for water), i.r. spectra, and X-ray powder diffraction patterns. These adducts include compounds with methanol, ethanol, propanol, butanol, dioxane, pyridine, 2- and 4- methylpyridine, 2,4- and 2,6-dimethylpyridine, acetone, benzene, and acetylacetoneimine. Most of the adducts contain one or more moles of water per mole of chelate. It is concluded that when water and an organic donor are both present, only the water is coordinated to the rare earth ion and that the organic donor molecules are hydrogen-bonded or held in the crystal by lattice forces. © 1969.