Studies on some lanthanide(Ⅲ)complexes with 4-hydroxyantipyrine
来源期刊：JOURNAL OF RARE EARTHS2008年第3期
论文作者：P. Indrasenan G. Rijulal
Key words：synthesis; lanthanide(III) complexes; 4-hydroxyantipyrine; rare earths;
Abstract: Seven new lanthanide(III) complexes with 4-hydroxyantipyrine were synthesized. These complexes were characterized by elemental analysis, molar conductance, magnetic moment measurements, FT-IR, electronic and 1HNMR spectra, X-ray powder diffraction, and thermogravimetric studies. The ligand, 4-hydroxyantipyrine (hap), contained carbonyl oxygen and hydroxyl oxygen as potential donor sites. On coordination, deprotonation occurred and as a result, hap acted as a monobasic bidentate ligand. A coordination number 6 was assigned to the lanthanide(III) ions in these complexes with orthorhombic structure. All the complexes were thermally stable～150℃ and underwent decomposition in three stages with the formation of Ln2O3 as the final residues.
P. Indrasenan1，G. Rijulal1
(1.Department of Chemistry, University of Kerala, Kariavattom Campus, Trivandrum -695 581, Kerala, India)
Abstract:Seven new lanthanide(III) complexes with 4-hydroxyantipyrine were synthesized. These complexes were characterized by elemental analysis, molar conductance, magnetic moment measurements, FT-IR, electronic and 1HNMR spectra, X-ray powder diffraction, and thermogravimetric studies. The ligand, 4-hydroxyantipyrine (hap), contained carbonyl oxygen and hydroxyl oxygen as potential donor sites. On coordination, deprotonation occurred and as a result, hap acted as a monobasic bidentate ligand. A coordination number 6 was assigned to the lanthanide(III) ions in these complexes with orthorhombic structure. All the complexes were thermally stable～150℃ and underwent decomposition in three stages with the formation of Ln2O3 as the final residues.
Key words:synthesis; lanthanide(III) complexes; 4-hydroxyantipyrine; rare earths;
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