Hexakis(dimethylformamide)iron(II) complex cation in hexahalorhenate(IV)-based salts: synthesis,X-ray structure and magnetic properties |
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Authors: | Carlos Rojas-Dotti Nicolás Moliner |
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Affiliation: | 1. Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol), Universitat de València, Valencia, Spain;2. Cátedra de Química Inorgánica, Facultad de Química, Departamento Estrella Campos, Universidad de la República, Montevideo, Uruguay |
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Abstract: | AbstractTwo iron(II)-rhenium(IV) compounds of general formula [FeII(dmf)6][ReIVX6] [X = Cl (1) and Br (2); dmf = N,N-dimethylformamide] have been prepared and characterized. X-ray powder diffraction measurements on samples of 1 and 2 support the same structure for both systems. The crystal structure of 1 was determined by single-crystal X-ray diffraction. 1 crystallizes in the triclinic system with space group Pī. Each iron(II) is six-coordinate and bonded to six oxygens from six dmf molecules building a distorted octahedral environment. Rhenium(IV) is six-coordinate by six halide anions in an almost regular octahedral geometry. The magnetic properties were investigated from variable-temperature magnetic susceptibility measurements performed on microcrystalline samples of 1 and 2, whose experimental data were reproduced by a model of two isolated paramagnetic centers [S = 2 (FeII) and S = 3/2 (ReIV)] with large values of zero-field splitting (zfs) parameter. |
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Keywords: | Rhenium(IV) complexes iron(II) complexes X-ray diffraction magnetic properties |
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