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Keywords:

  • bifluoride ligands;
  • bridging ligands;
  • coordination polymers;
  • copper;
  • magnetic properties
Thumbnail image of graphical abstract

The two-dimensional antiferromagnet [Cu(HF2)2(pyz)]n (pyz=pyrazine) has a rectangular lattice (see picture) displaying two types of FHF bridging modes. The spin exchange through Cu-(FHF)2-Cu is about 90 % stronger than through Cu-pyz-Cu, and the μ1,1-coordinated FHF, which is close in nature to F⋅⋅⋅HF, is largely responsible for the exchange. C black, Cu red, F green, H cyan.