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Heterobimetallic assemblies of Ni(II) complexes with a tetradentate amine ligand and diamagnetic cyanidometallates |
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| Authors: | Ivan Nemec,Radovan Herchel,Ingrid Svoboda,?ubor Dlhá ň,Hartmut Fuess |
| Affiliation: | a Institute of Inorganic Chemistry, Slovak University of Technology, SK-812 37 Bratislava, Slovakia b Department of Inorganic Chemistry, Faculty of Science, Palacký University, CZ-77147 Olomouc, Czech Republic c Materials Science, Darmstadt University of Technology, D-64287 Darmstadt, Germany d Regional Centre of Advanced Technologies and Materials, Department of Inorganic Chemistry, Faculty of Science, Palacky University, 17. Listopadu 12, CZ-77146 Olomouc, Czech Republic |
| Abstract: | Syntheses and crystal structures of nickel(II) complexes containing teta (teta = N,N′-bis(2-aminoethyl)ethane-1,2-diamine) as a tetradentate blocking ligand and cyanidometallic bridging complexes are described. The complexes [Ni(teta)(cis-μ2-Ni(CN)4)] (1) and [{Ni(teta)}3(μ6-Co(CN)6)] (ClO4)3 (2) exhibit a 1D-polymeric structure whereas the heterometallic trinuclear complex [Ni(teta)(μ1-Ag(CN)2)2] (3) forms a unique network. The weak antiferromagnetic exchange was found in polymeric species 1 and 2 by analyzing the magnetic data with several models in which either only susceptibility was treated or simultaneous fitting of temperature and magnetic field dependences of the magnetization was applied using the finite-size closed ring approach. Moreover, an effect of the zero-field splitting phenomenon (ZFS) was considered for 2 by advanced modeling of magnetic properties for varying axial ZFS parameter/isotropic exchange (D/J) ratios. |
| Keywords: | Heterobimetallic complex Nickel(II) complex X-ray structure Magnetism Cyanidometallate |
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