Transition Metal Chemistry

, Volume 4, Issue 4, pp 239–243 | Cite as

Coordination compounds derived from transition metal salts and bis(3,5-dimethylpyrazolyl)methane

  • Jan Reedijk
  • Jan Verbiest
Full Papers


The preparation of transition metal complexes containing the sterically hindered ligand, bis(3,5-dimethylpyrazolyl)methane (LL) is described. Compounds of formula M(LL)X2 (M = CoII, NiII or ZnII and X = Cl or Br) or M(LL)2X2 (M = MnII, FeII, CoII, NiII, CuII, ZnII or CdII and X = ClO 4 ; M = CoII, NiII, CuII or ZnII and X = NO 3 ; M = NiII or CuII and X = Cl or Br) have been isolated. In addition, an apparently trimeric Cu3(LL)4Cl6 · EtOH compound is reported. For Ni(LL)Cl2 a five-coordinated chloro-bridged dimer is found. The perchlorato compounds, M(LL)2(ClO4)2, appear to have one bidentate ClO 4 and one ionic ClO 4 group. The M(LL)2 species appears to occur either in octahedral geometry, leaving twocis-positions free, or in a tetrahedral geometry without space for other ligands, and probably also in a five-coordinate geometry with one free ligand position.

Structural conclusions are drawn from i.r., far-i.r. and ligand-field spectra, x-ray powder patterns, magnetic susceptibility data, e.s.r. spectra and conductivity data.


Magnetic Susceptibility EtOH Metal Salt Coordination Compound Free Ligand 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Verlag Chemie, GmbH 1979

Authors and Affiliations

  • Jan Reedijk
    • 1
  • Jan Verbiest
    • 1
  1. 1.Department of ChemistryDelft University of TechnologyDelftThe Netherlands

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