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Abstract:

Reaction between [Co2(μ-OH2)(μ-Piv) 2(Piv)2(HPiv)4] and a (salicylidene) ethanolamine ligand under ambient reaction conditions, affords hexanuclear complexes [CoIII2CoII4(Piv) 8(HPiv)2(L)2(OH)2] (1-2). Both products have been characterized crystallographically and found to be mixed-valent, containing divalent and trivalent Co centers. Down to 30 K, the variable-temperature magnetic susceptibility data are dominated by the single-ion properties of high spin Co(II) centers with distorted-octahedral coordination geometries. Below this temperature, the effect of intramolecular ferromagnetic exchange interactions becomes apparent. Magnetic data has been analyzed in terms of ground isolated effective S̃=1/2Kramers doublets where low temperature magnetization data suggests an anisotropic behavior. We have also employed DFT-broken symmetry calculations to evaluate in an isotropic approach the exchange interaction pathways. © 2011 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology
Autor:Lazzarini, I.C.; Carrella, L.; Rentschler, E.; Alborés, P.
Filiación:Departamento de Quimica Inorganica, Analitica y Quimica Fisica/ INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón 2, C1428EHA Buenos Aires, Argentina
Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
Palabras clave:Cobalt polynuclear complexes; Crystal structure; DFT calculations; Ferromagnetic; Magnetic properties
Año:2012
Volumen:31
Número:1
Página de inicio:779
Página de fin:788
DOI: http://dx.doi.org/10.1016/j.poly.2011.11.002
Título revista:Polyhedron
Título revista abreviado:Polyhedron
ISSN:02775387
CODEN:PLYHD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02775387_v31_n1_p779_Lazzarini

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Citas:

---------- APA ----------
Lazzarini, I.C., Carrella, L., Rentschler, E. & Alborés, P. (2012) . Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology. Polyhedron, 31(1), 779-788.
http://dx.doi.org/10.1016/j.poly.2011.11.002
---------- CHICAGO ----------
Lazzarini, I.C., Carrella, L., Rentschler, E., Alborés, P. "Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology" . Polyhedron 31, no. 1 (2012) : 779-788.
http://dx.doi.org/10.1016/j.poly.2011.11.002
---------- MLA ----------
Lazzarini, I.C., Carrella, L., Rentschler, E., Alborés, P. "Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology" . Polyhedron, vol. 31, no. 1, 2012, pp. 779-788.
http://dx.doi.org/10.1016/j.poly.2011.11.002
---------- VANCOUVER ----------
Lazzarini, I.C., Carrella, L., Rentschler, E., Alborés, P. Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology. Polyhedron. 2012;31(1):779-788.
http://dx.doi.org/10.1016/j.poly.2011.11.002