Synthesis, properties of lanthanide trifluoroacetate complexes with 2-azacyclononanone and X-ray crystal structure of [Sm(CF3COO)(3)(AZA)(2)center dot(H2O)](2)center dot 2AZA

Authors
Pimentel, PM Oliveira, VS Silva, ZR Melo, DMA Zinner, LB Vicentini, G Bombieri, G
Citation
Pm. Pimentel et al., Synthesis, properties of lanthanide trifluoroacetate complexes with 2-azacyclononanone and X-ray crystal structure of [Sm(CF3COO)(3)(AZA)(2)center dot(H2O)](2)center dot 2AZA, POLYHEDRON, 20(20), 2001, pp. 2651-2657
Citations number
28
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
POLYHEDRON
ISSN journal
02775387 → ACNP
Volume
20
Issue
20
Year of publication
2001
Pages
2651 - 2657
Database
ISI
SICI code
0277-5387(20010915)20:20<2651:SPOLTC>2.0.ZU;2-B
Abstract
Lanthanide trifluoroacetate complexes (Ln = La, Pr, Nd, Sm, Tb, Gd, Tb, Er) with 2-azacyclononanone (AZA) were synthesized and characterized. Complexo metric analysis with EDTA and microanalytical procedures agree with the gen eral formula Ln(TFA)(3). 3AZA; thermogravimetric curves in N-2 dynamic atmo sphere show their thermal stability until about 100 degreesC. The europiurn emission spectrum indicates more than one Eu3+ symmetry centre. The X-ray structure of the samarium complex consists of dimeric species where the met al atoms are connected through four TFA bridges, a monodentate TFA, two O-b onded AZA ligands and a water molecule complete the coordination sphere abo ut each samarium. (C) 2001 Elsevier Science Ltd. All rights reserved.