Lanthanide(III) complexes with composition Ln(nic)(H2O)n(pic)3(nic) (Ln=Pr, Nd n=8; Tm n=7) (pic=picrate, nic=nicotinamideN-O) were obtained by reaction of the hydrated lanthanide picrate with nicotinamideN-oxide in ethanol. They were characterized by elemental analysis and IR spectra. The molecular structures of Pr, Nd and Tm complexes were established by X-ray crystallography. Different triclinic phases have been detected for the isostructural Nd and Pr derivatives. They are nine coordinated to eight water molecules and a monodentate nic ligand while the apparently isomorphous Tm derivative looses a water molecule with a eight coordination number and a coordination geometry changing from tricapped trigonal prism (Pr, Nd) to square antiprismatic.

The role of the picric acid in the hydrated lanthanide derivatives with neutral ligands. Synthesis and X-ray structures of hydrated neodymium, praseodymium and thulium picrate complexes with nicotinamide-N-oxide / G. Bombieri, A. Del Pra, F. Benetollo, K. Zinner, D.M. Araujo Melo, L.D. Belarmino, G. Vicentini. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - 348(2003), pp. 254-262.

The role of the picric acid in the hydrated lanthanide derivatives with neutral ligands. Synthesis and X-ray structures of hydrated neodymium, praseodymium and thulium picrate complexes with nicotinamide-N-oxide

G. Bombieri
Primo
;
A. Del Pra
Secondo
;
2003

Abstract

Lanthanide(III) complexes with composition Ln(nic)(H2O)n(pic)3(nic) (Ln=Pr, Nd n=8; Tm n=7) (pic=picrate, nic=nicotinamideN-O) were obtained by reaction of the hydrated lanthanide picrate with nicotinamideN-oxide in ethanol. They were characterized by elemental analysis and IR spectra. The molecular structures of Pr, Nd and Tm complexes were established by X-ray crystallography. Different triclinic phases have been detected for the isostructural Nd and Pr derivatives. They are nine coordinated to eight water molecules and a monodentate nic ligand while the apparently isomorphous Tm derivative looses a water molecule with a eight coordination number and a coordination geometry changing from tricapped trigonal prism (Pr, Nd) to square antiprismatic.
Settore CHIM/08 - Chimica Farmaceutica
Settore CHIM/03 - Chimica Generale e Inorganica
2003
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/10476
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