4.5 Article

Heterobimetallic assemblies of Ni(II) complexes with a tetradentate amine ligand and diamagnetic cyanidometallates

Journal

INORGANICA CHIMICA ACTA
Volume 366, Issue 1, Pages 366-372

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2010.11.028

Keywords

Heterobimetallic complex; Nickel(II) complex; X-ray structure; Magnetism; Cyanidometallate

Funding

  1. Slovakia: VEGA [1/0213/08]
  2. Slovakia: APVV [0006-07]
  3. Slovakia: VVCE [0004-07]
  4. Czech Republic: Operational Program Research and Development for Innovations - European Social Fund [CZ.1.05/2.1.00/03.0058, MSM6198959218]
  5. Germany: DAAD

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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-mu(2)-Ni(CN)(4))] (1) and [{Ni(teta)}(3)(mu(6)-Co(CN)(6))] (ClO4)(3) (2) exhibit a 1D-polymeric structure whereas the heterometallic trinuclear complex [Ni(teta)(mu(1)-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. (C) 2010 Elsevier B.V. All rights reserved.

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