Investigation of 5-chloro-2-methoxybenzoates of La(III), Gd(III) and Lu(III) Complexes |
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Authors: | Czajka B Bocian B Ferenc W |
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Institution: | (1) Central Laboratory of Batteries and Cells, ul. Forteczna 12/14, Pl 61-362 Poznań, Poland;(2) Department of General Chemistry, Faculty of Chemistry, Maria Curie-Skłodowska University, Pl 20-031 Lublin, Poland |
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Abstract: | 5-Chloro-2-methoxybenzoates of La(III), Gd(III) and Lu(III) were synthesized as penta-, mono- and tetrahydrates with a metal
to ligand ratio of 1:3 and with white colour typical of La(III), Gd(III) and Lu(III) ions. The complexes were characterized
by elemental analysis, IR and FIR spectra, thermogravimetric and diffractometric studies. The carboxylate group appears to
be a symmetrical, bidentate, chelating ligand. The complexes are polycrystalline compounds. Their thermal stabilities were
studied in air and inert atmospheres. When heated they dehydrate to form anhydrous salts which next in air are decomposed
through oxychlorides to the oxides of the respective metals while in inert atmosphere to the mixture of oxides, oxychlorides
of lanthanides and carbon. The most thermally stable in air, nitrogen and argon atmospheres is 5-chloro-2-methoxybenzoate
of Gd(III).
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | FIR FTIR and IR spectra of La (III) Gd(III) Lu(III) complexes thermal stability of compounds in air and in nitrogen atmospheres X-ray powder diffraction of lanthanide complexes |
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