Synthesis,characterization and magnetic properties of mixed-valence iron complexes with 2-pyridyl oximes |
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| Authors: | Lorena Martínez Livia Arizaga Donatella Armentano Francesc Lloret Ricardo González Carlos Kremer |
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| Affiliation: | 1. área Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay;2. Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Cosenza, Italy;3. Departament de Química Inorgánica/Instituto de Ciencia Molecular, Facultat de Química de la Universitat de València, València, Spain |
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| Abstract: | AbstractTwo new mixed-valence iron complexes with 2-pyridyl oximes, [Fe(mpko)3Fe(H2O)2(NO3)](NO3)·2H2O (1) (mpko? = methyl(2-pyridyl)ketone oximate) and [{Fe(dpko)3}2Fe](ClO4)·4H2O (2) (dpko? = bis(2-pyridyl)ketone oximate), have been prepared by reaction of FeIII with mpkoH in methanol (1) and FeII with dpkoH in methanol/water (2). Dinuclear FeII(low-spin)FeIII(high-spin) and trinuclear FeII(low-spin)FeIII(high-spin)FeII(low-spin) cations are present in the crystal structure of 1 and 2, respectively. Intermolecular hydrogen bonds in 1 lead to weak antiferromagnetic interactions between pairs of neighboring FeIII centers, which allows observation of single-ion zero-field splitting effects. |
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| Keywords: | Iron(II)/(III) complexes methyl(2-pyridyl)ketone oxime bis(2-pyridyl)ketone oxime magnetic exchange mediated by hydrogen bonds crystal structure |
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