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Preparation of some lanthanide violurate complexes
Author(s) -
Farag I. S. Ahmed,
Awadallah R. M.,
Gad A. A. M.
Publication year - 1989
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170240215
Subject(s) - lanthanide , chemistry , crystallography , ligand (biochemistry) , oxygen atom , metal , infrared spectroscopy , oxygen , metal ions in aqueous solution , inorganic chemistry , ion , molecule , organic chemistry , biochemistry , receptor
Violurate complexes of Ce 3+ , Pr 3+ , Pr 4+ , Nd 3+ , Sm 3+ , Eu 3+ , Gd 3+ , Dy 3+ , Ho 3+ , Er 3+ , and Yb 3+ were prepared. The prepared complexes are freely soluble in hot water and dilute mineral acids. Thermal analysis (DTA, DTG, and TGA) show that the solid complexes are characterized by endo‐ and exothermic bands, indicating that they are degradated at different temperature stages. The IR spectra of the ligand and its metal complexes reveal that bonding takes place through coordination bonds between the central metal ion and the oxygen atom of the oximino (C = NO) group and the oxygen of the phenolic (ketonic group . All the isomorphous complexes, detected by the X‐ray diffraction patterns, have similar IR spectra.