Rare earth iodide complexes of 4-formyl-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one

Article abstract of DOI:10.1080/00945719909349523

Rare earth complexes of 4-formyl-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one (FDPP) having the general formula [Ln(FDPP)₄I₂]I, where Ln = Y, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho and Er, have been synthesised and characterised by elemental analyses, molar conductance in non-aqueous solvents, electronic, infrared and proton NMR spectra as well as thermogravimetric analyses. FDPP acts as a neutral monodentate ligand coordinating through the ring carbonyl oxygen. Two of the iodide ions are coordinated. A coordination number of six may be assigned to the metal ion in these complexes. The covalency parameters evaluated from the solid state electronic spectra suggest weak covalent character of the metal-ligand bond. The TG data of the lanthanum complex indicate that the complex is stable up to about 140° C and undergoes decomposition in three stages forming lanthanum oxide as the final product.

Full text of DOI:10.1080/00945719909349523

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Synthesis and Reactivity in
Inorganic and Metal-Organic
Chemistry
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Rare Earth Iodide Complexes
of 4-Formyl-2, 3-Dimethyl-l-
Phenyl-3-Pyrazolin-5-One
Siby Joseph a & P. K. Radhakrishnan a
a School of Chemical Sciences , Mahatma Gandhi
University , Kottayam, 686 560, Kerala, India
Published online: 14 Apr 2008.
To cite this article: Siby Joseph & P. K. Radhakrishnan (1999) Rare Earth Iodide
Complexes of 4-Formyl-2, 3-Dimethyl-l-Phenyl-3-Pyrazolin-5-One, Synthesis and
Reactivity in Inorganic and Metal-Organic Chemistry, 29:7, 1219-1229
To link to this article: http://dx.doi.org/10.1080/00945719909349523
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