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Inicio » Actividades I+D > Publicaciones 2007 > A seven-coordinate FeIII compound: [Fe{O...
artículo con referato
"A seven-coordinate FeIII compound: [Fe{O(CH2CO2)2}(H2O)2(NO3)]. Preparation, structure and magnetic properties"
L.D. Slep, R. Calvo, O.R. Nascimento, R. Baggio, M.T. Garland, O. Peña and M. Perec
Inorg. Chim. Acta 360(9) (2007) 2911-2916
A seven-coordinate FeIII complex, [Fe(oda)(H2O)2(NO3)], was obtained after dissolving Fe(NO3)3 · 9H2O in an aqueous solution of oxydiacetic acid (H2oda) at room temperature. In the solid state, the FeIII center adopts a pentagonal bipyramid geometry with an {FeO7} core formed by a tridentate oda2- and a bidentate in the equatorial plane, and two axial water molecules. Magnetic measurements and EPR spectra revealed the presence of S = 5/2 FeIII centers with rhombic zero field splitting parameters (D = 0.81 cm-1, E/D = 0.33 ). Weak antiferromagnetic interactions with J ~ -0.06 cm-1 operating between neighboring Fe ions connected through Fe–O–C–OH–O–Fe paths are estimated using the molecular field approximation.
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