Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 88: Issue 3
Thermal, spectral and magnetic behaviour of 4-chloro-2-methoxybenzoates of light lanthanides(III)
Authors:
Wiesława Ferenc Maria Curie-Skłodowska University Faculty of Chemistry 20-031 Lublin Poland

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B. Cristóvão Maria Curie-Skłodowska University Faculty of Chemistry 20-031 Lublin Poland

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J. Sarzyński Maria Curie-Skłodowska University Institute of Physics 20-031 Lublin Poland

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Maria Wojciechowska Maria Curie-Skłodowska University Faculty of Chemistry 20-031 Lublin Poland

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Pages:
877–883
Online Publication Date:
27 Jun 2006
Publication Date:
01 Jun 2007
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-005-7464-3
Keywords:
4-chloro-2-methoxybenzoates; complexes of rare earths; magnetic susceptibility determinations; spectrochemical and thermal stability investigations
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Abstract  

4-Chloro-2-methoxybenzoates of light lanthanides(III) were obtained as mono-, di-or trihydrates with metal to ligand ratio of 1:3 and general formula Ln(C8H6ClO3)3·nH2O, where n=1 for Ln=Ce, Pr, n=2 for Ln=Nd, Sm, Eu, Gd and n=3 for Ln=La. The complexes were characterized by elemental analysis, IR spectra, thermogravimetric studies, X-ray diffraction and magnetic measurements. The carboxylate group appears to be a symmetrical bidentate, chelating ligand. All complexes seem polycrystalline compounds. Their thermal stabilities were determined in air. When heated they dehydrate to form anhydrous salts which next are decomposed to the oxides of the respective metals. The solubilities of light lanthanide(III) 4-chloro-2-methoxybenzoates in water at 293 K are of the order of 10−5 mol dm−3. The magnetic moments were determined over the range of 77–300 K. They obey the Curie-Weiss law. The values of μeff calculated for all compounds are close to those obtained for Ln3+ by Hund and Van Vleck. The results indicate that there is no influence of the ligand field of 4f electrons on lanthanide ions and the metal ligand bonding is mainly electrostatic in nature.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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