Tri- and tetranuclear heteropivalate complexes with core {Fe2NixO} (x = 1, 2): Synthesis, structure, magnetic and thermal properties

Lutsenko IA, Kiskin MA, Nelyubina YV, Efimov NN, Maksimov YV, Imshennik VK, Zueva EM, Goloveshkin AS, Khoroshilov AV, Rentschler E, Sidorov AA, Eremenko IL (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Polyhedron Elsevier

Book Volume: 159

Pages Range: 426-435

DOI: 10.1016/j.poly.2018.12.018

Abstract

The reactions of complex [Fe2Ni(O)(Piv)6(Et2O)(H2O)2] (1) with 1,10-phenanthroline (phen) and 2,2′-bipyridine (bpy) gave the following new coordination compounds: the trinuclear complex [Fe2Ni(O)(Piv)6(phen)H2O]·(C2H5)2O (2), the tetranuclear ones [Fe2Ni2(OH)2(Piv)8(phen)2] (3) and [Fe2Ni2(OH)2(Piv)8(bpy)2] (4), depending on the crystallization conditions. According to single crystal X-ray diffraction data, all the compounds have molecular structures. The Mössbauer spectra of 1–3 correspond to high-spin Fe3+ ions in an octahedral environment consisting of oxygen atoms. The DC magnetic susceptibility studies and quantum-chemical analysis of intra- and intermolecular J pathways using broken-symmetry density functional theory (DFT) showed that all exchange interactions in tri- (1, 2) and tetranuclear (3) complexes are antiferromagnetic. The exchange coupling is weaker in 3 due to the lower ability of the bridging OH-groups to mediate superexchange. Thermal destruction processes have been studied for 2 and 3. The final products of thermolysis are the mixed oxide NiFe2O4.

Involved external institutions

Russian Academy of Sciences / Росси́йская акаде́мия нау́к (RAS) RU Russian Federation (RU) Kazan State Technological University (KNRTU) / Казанский национальный исследовательский технологический университет RU Russian Federation (RU) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE)

How to cite

APA:

Lutsenko, I.A., Kiskin, M.A., Nelyubina, Y.V., Efimov, N.N., Maksimov, Y.V., Imshennik, V.K.,... Eremenko, I.L. (2019). Tri- and tetranuclear heteropivalate complexes with core {Fe2NixO} (x = 1, 2): Synthesis, structure, magnetic and thermal properties. Polyhedron, 159, 426-435. https://doi.org/10.1016/j.poly.2018.12.018

MLA:

Lutsenko, Irina A., et al. "Tri- and tetranuclear heteropivalate complexes with core {Fe2NixO} (x = 1, 2): Synthesis, structure, magnetic and thermal properties." Polyhedron 159 (2019): 426-435.

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