The Metal Chelates of Heterocyclic /3-Diketones and their Derivatives, Part IV New Mixed Ligand Tetrakis Complexes of Lanthanides Derived from tris-Acetylacetonates and Some 4-Acyl Pyrazolones
نویسنده
چکیده
The preparation of Lanthanon octa-coordinated mixed chelates with different types of ligands is uncommon. Thompson and Loraas [1] have shown the presence of octacoordinated mixed chelates in solution. Recently, Dutt and Sur [2] have actually isolated several mixed tetrakis compounds of La, Pr, Nd, and Sm with three acetylacetone (Acac) molecules, the other ligands being propionylacetone or benzoylacetone or dibenzoylmethane. This paper describes the preparation and characterisation of some mixed tetrakis complexes of La, Ce, Pr, Nd and Gd with three Acac molecules, the other ligand being l-phenyl-3-methyl-4-acetyl-pyrazolone-5 or l-phenyl-3-methyl-4-benzoyl-pyrazolone-5.
منابع مشابه
The Metal Complexes of Heterocyclic /?-Diketones and their Derivatives, Part VIII Synthesis, Structure, Proton NMR and Infrared Spectral Studies of the Complexes
New complexes of Al(III), Fe(III), Co(III), Rh(III), In(III) and Zr(IV) with 1-phenyl3-methyl-4-trifluoroacetyl-pyrazolone-5, (HPMTFP), have been synthesized and characterized by means of elemental analyses, conductivity and magnetic moment measurements, proton NMR and infrared spectroscopy. It is concluded that the ligand, HPMTFP, reacts as a bidentate enol forming neutral metal chelates. The ...
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