title: NiIIformate complexes with bi- and tridentate nitrogen-donor ligands: synthesis, characterization, and magnetic and thermal properties.
abstract: The synthesis of four NiIIformate complexes of the type [Ni(N∩N)n][O2CH]2(2, adduct with 3/4 EtOH, N∩N = en, e[combining low line]thylen[combining low line]ediamine, n = 3; 4, N∩N = dien, N,N',N''-d[combining low line]i[combining low line]e[combining low line]thylen[combining low line]etriamine, n = 2), [Ni2(O2CH)4(H2O)(tmeda)2] (3, tmeda = N,N,N',N'-t[combining low line]etram[combining low line]ethyle[combining low line]thylened[combining low line]ia[combining low line]mine) and [{Ni(O2CH)2(pmdta)}2·H2O] (5, pmdta = N,N',N',N'',N''-p[combining low line]entam[combining low line]ethyld[combining low line]iethylenet[combining low line]ria[combining low line]mine) by a reaction of [{Ni(O2CH)2}·2H2O] (1) with the respective N-donor bases is reported. The structures of 2-5 in the solid state were determined by single X-ray structure analysis, revealing a discrete dinuclear structure of 3 and the formation of polymeric networks in the case of 2, 4 and 5 due to intermolecular hydrogen bonding. SQUID and ESR measurements of 3 evidenced a weak antiferromagnetic coupling between the NiIIions and an easy plane magnetic anisotropy. Accompanying quantum chemical studies of the magnetic properties and IR characteristics of 3 were performed to strengthen the conclusions drawn from experimentally obtained data. The thermal decomposition temperatures of 2-5 were determined by TG (thermogravimetry) and obtained residues were analyzed by PXRD (powder X-ray diffraction) measurements. The decomposition processes were completed at 207 (3), 215 (5), 250 (2) and 273 °C (4) and are shown to result in the formation of pure metallic nickel.
authors.affiliation: Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry, 09107 Chemnitz, Germany.
authors.forename: Karoline
authors.initials: K
authors.lastname: Rühlig
authors.affiliation: Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry, 09107 Chemnitz, Germany.
authors.forename: Akerke
authors.initials: A
authors.lastname: Abylaikhan
authors.affiliation: Leibniz Institute for Solid State and Materials Research IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany.
authors.forename: Azar
authors.initials: A
authors.lastname: Aliabadi
authors.affiliation: Leibniz Institute for Solid State and Materials Research IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany.
authors.forename: Vladislav
authors.initials: V
authors.lastname: Kataev
authors.affiliation: TU Bergakademie Freiberg, Institute of Theoretical Physics, Leipziger Strasse 23, 09599 Freiberg, Germany.
authors.forename: Simon
authors.initials: S
authors.lastname: Liebing
authors.affiliation: TU Bergakademie Freiberg, Institute of Theoretical Physics, Leipziger Strasse 23, 09599 Freiberg, Germany.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Schwalbe
authors.affiliation: TU Dresden, Theoretical Chemistry, Bergstrasse 66c, 01062 Dresden, Germany.
authors.forename: Kai
authors.initials: K
authors.lastname: Trepte
authors.affiliation: TU Bergakademie Freiberg, Institute of Theoretical Physics, Leipziger Strasse 23, 09599 Freiberg, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Ludt
authors.affiliation: TU Bergakademie Freiberg, Institute of Theoretical Physics, Leipziger Strasse 23, 09599 Freiberg, Germany.
authors.forename: Jens
authors.initials: J
authors.lastname: Kortus
authors.affiliation: Leibniz Institute for Solid State and Materials Research IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Büchner
authors.affiliation: Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry, 09107 Chemnitz, Germany.
authors.forename: Tobias
authors.identifier: http://orcid.org/0000-0001-8948-1477
authors.initials: T
authors.lastname: Rüffer
authors.affiliation: Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry, 09107 Chemnitz, Germany.
authors.forename: Heinrich
authors.initials: H
authors.lastname: Lang