Supramolecular structures and stereochemical versatility of azoquinoline containing novel rare earth metal complexes.
Spectrochim Acta A Mol Biomol Spectrosc
; 68(1): 134-8, 2007 Sep.
Article
en En
| MEDLINE
| ID: mdl-17292663
ABSTRACT
Rare earth complexes of 5-(phenylazo)-8-hydroxyquinoline (HL) of composition [M(L)(2)X.H(2)O] [where M=La, Ce, Pr, Nd and X=NO(3)(-) or NCS(-)] have been prepared and characterized on the basis of their chemical analyses, (1)H NMR, magnetic measurements, conductance, and visible and IR spectral data. Composition, conductance and IR spectral data of the complexes show that the HL acts as a bidentate monobasic ligand. The visible spectra of Pr(3+) and Nd(3+) show characteristic f-f transitions, and the nephelauxetic effect (1-beta) of these transitions has been evaluated. These data indicate the weak involvement of the 4f orbitals in complex formation.
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Base de datos:
MEDLINE
Asunto principal:
Compuestos Azo
/
Espectroscopía de Resonancia Magnética
/
Hidroxiquinolinas
/
Metales de Tierras Raras
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Spectrochim Acta A Mol Biomol Spectrosc
Asunto de la revista:
BIOLOGIA MOLECULAR
Año:
2007
Tipo del documento:
Article