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Updated: Jan 16, 2026
Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
Synthesis and Characterization of the μ6‑F Compounds [NEt4][F(Cl2)3] and [NEt4][F(Br2)3]
Jonas R Schmid1, Patrick Pröhm1, Patrick Voßnacker1
1Freie Universität Berlin, Institute of Chemistry and Biochemistry, Fabeckstr. 34/36, Berlin 14195, Germany.
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The reaction of tetraethylammonium polychlorides or polybromides in propionitrile with substoichiometric amounts of diluted fluorine at low temperatures leads to the non-classical interhalogen compounds [NEt4]-[F-(X2)3] (X = Cl and Br). These compounds are the first examples of anions containing a central μ6 fluoride anion, which is octahedrally surrounded by Br2 or Cl2 units, respectively. Single-crystal X-ray diffraction revealed that these compounds crystallize in the cubic system with every fluoride anion bridged by halogen units, resulting in a 3D network. Furthermore, single-crystal Raman and IR spectra were measured, and investigations using solid-state calculations were carried out.
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