Synthesis, crystal structure, magnetism and electrochemical properties of two copper(II) furoyltrifluoroacetonate complexes with nitroxide radical

Denise A. Souza, Yanko Moreno, Eduardo A. Ponzio, Jackson A.L.C. Resende, Alessandro K. Jordão, Anna C. Cunha, Vitor F. Ferreira, Miguel A. Novak, Maria G.F. Vaz

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

12 Citas (Scopus)

Resumen

Two new magnetic copper compounds were obtained using the 4,4,4-trifluoro-1-furoylbutane-1,3-dione (Ftfac) ligand and two nitroxide radicals: 3-pyridyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (NITmPy) and 4-hydroxy-2,2,6,6-tetramethylpiperidinyl-N-oxy (Tempol). The complexes with formula [Cu(Ftfac)2(NITmPy)2] (1) and [Cu(Ftfac) 2(Tempol)] (2) were structurally characterized by single-crystal X-ray diffraction. In compound 1, the copper ion has a distorted octahedral environment, bound to two NITmpPy ligands through the nitrogen atom of the pyridine ring. In compound 2, the copper ion has a distorted pyramidal environment in which the apical position is occupied by the oxygen atom of the Tempol hydroxyl group. The temperature dependence of the magnetic susceptibility of the two compounds was investigated. It was found that compound 1 presents ferromagnetic interaction (J = 9.1 cm-1) among copper(II) ions and NITmPy radicals. As a result of the interconnection between molecular moieties through H-bonds, compound 2 presents an unusual magnetic behavior with alternating ferro- and antiferromagnetic interactions.

Idioma originalInglés
Páginas (desde-hasta)469-473
Número de páginas5
PublicaciónInorganica Chimica Acta
Volumen370
N.º1
DOI
EstadoPublicada - 15 may 2011

Áreas temáticas de ASJC Scopus

  • Química física y teórica
  • Química inorgánica
  • Química de los materiales

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