Showing papers in "Inorganic Chemistry in 1967"

Rare earth chelates of 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyl-4,6-octanedione

Abstract: Abstract : Inner complexes of fourteen trivalent rare earth ions with the bidentate ligand 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyl-4,6-octanedionate, fod, were synthesized and studied. The products isolated have the formula, M(fod)3.H2O, but are easily dehydrated in vacuo over P4O10 or by heating in an anhydrous atmosphere. The beta-diketonate ligand was synthesized via a Claisen condensation. The fod complexes of Sc(III), Cr(III), and Al(III) were also prepared and all found to have the formula, M(fod)3. The anhydrous rare earth complexes and the Sc, Cr, and Al compounds are six-coordinate. The chromium and aluminum complexes are octahedral but the structures of the rare earth and scandium complexes are unknown. The coordination numbers and structures of the hydrated rare earth complexes are also unknown. The anhydrous rare earth complexes are the most volatile rare earth compounds known, and they were studied by gas chromatography and thermogravimetric analysis. The volatilities of these compounds vary in inverse proportion with the ionic radius of the metal ion. (Author)