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M. Iwan Faculty of Chemistry UMCS Department of General and Coordination Chemistry Lublin Poland 20-031 Maria Curie Skłodowska Sq.2 Lublin Poland 20-031 Maria Curie Skłodowska Sq.2

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R. Łyszczek Faculty of Chemistry UMCS Department of General and Coordination Chemistry Lublin Poland 20-031 Maria Curie Skłodowska Sq.2 Lublin Poland 20-031 Maria Curie Skłodowska Sq.2

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A. Ostasz Faculty of Chemistry UMCS Department of General and Coordination Chemistry Lublin Poland 20-031 Maria Curie Skłodowska Sq.2 Lublin Poland 20-031 Maria Curie Skłodowska Sq.2

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Z. Rzączyńska Faculty of Chemistry UMCS Department of General and Coordination Chemistry Lublin Poland 20-031 Maria Curie Skłodowska Sq.2 Lublin Poland 20-031 Maria Curie Skłodowska Sq.2

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Abstract  

Properties of lanthanide 1,2,4-benzenetricarboxylates and lanthanide 1,2,4,5-benzenetetracarboxylates obtained by a classical synthesis method and under hydrothermal conditions were compared. Solid 1,2,4-benzenetricarboxylates and 1,2,4,5-benzenetetracarboxylates of cerium, neodymium and erbium were prepared by a classical precipitation method. The same lanthanide compounds were obtained also from hydrothermal reaction. All obtained products were examined by elemental analysis. General formulae of complexes were: Ln(1,2,4-btc)xH2O and Ln4(1,2,4,5-btec)3yH2O. The thermal analysis shows that hydrothermal conditions cause the coordination of less number of water molecules to complex molecule. Because lanthanide ions exhibit the most often the coordination number equal 8 or 9 one can conclude that the coordination ability of carboxylic groups under hydrothermal conditions is different from that under mild ones. Probably, in hydrothermal conditions the carboxylic groups of 1,2,4-benzenetricarboxylate ions are able to form more coordination bonds with lanthanide ions than under normal pressure.

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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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