Hexakis(dimethylformamide)iron(II) complex cation in hexahalorhenate(IV)-based salts: synthesis, X-ray structure and magnetic properties. Issue 6 (19th March 2018)

• Record Type: Journal Article
• Authors: Rojas-Dotti, Carlos; Moliner, Nicolás; González, Ricardo; Martínez-Lillo, José
• Is Part Of: Journal of coordination chemistry. Volume 71:Issue 6(2018)
• Page Start: 737
• Page End: 747
• Publication Date: 2018-03-19
• Subjects: Rhenium(IV) complexes -- iron(II) complexes -- X-ray diffraction -- magnetic properties; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2017.1423477
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: Two iron(II)-rhenium(IV) compounds of general formula [Fe II (dmf)6 ][Re IV X6 ] [X = Cl (1 ) and Br (2 ); dmf = N, N -dimethylformamide] have been prepared and characterized. X-ray powder diffraction measurements on samples of1 and2 support the same structure for both systems. The crystal structure of1 was determined by single-crystal X-ray diffraction.1 crystallizes in the triclinic system with space group P ī. 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 of1 and2, whose experimental data were reproduced by a model of two isolated paramagnetic centers [ S = 2 (Fe II ) and S = 3/2 (Re IV )] with large values of zero-field splitting (zfs) parameter. Abstract :