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Updated: Feb 20, 2026

Synthesis of a Water-soluble Metal–Organic Complex Array
Published on: October 8, 2016
Coinage Metal Bis(trifluoromethyl)amido Complexes
Leon N Schneider1, Erik R Csapo1, Tanja Knuplez1
1Julius Maximilian University Würzburg, Institute of Inorganic Chemistry, Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Am Hubland, Würzburg 97074, Germany.
None:
A series of bis(trifluoromethyl)amido coinage metal(I) complexes were synthesized in yields of 52-93%. This includes N-heterocyclic carbene (NHC) complexes of copper(I), silver(I), and gold(I). In addition, the complex [(Ph3P)Au{N(CF3)2}] was obtained in 70% yield. The complexes are thermally robust, with decomposition temperatures of 151-259 °C (DSC onset), and they were characterized by spectroscopic methods and elemental analysis. The bis(trifluoromethyl)amido complexes [(IDipp)M{N(CF3)2}] (M = Cu, Ag, Au), [(ItBu)M{N(CF3)2}] (M = Cu, Ag), and [(Ph3P)Au{N(CF3)2}] were studied by single-crystal X-ray diffraction (SCXRD). A detailed analysis of selected bond parameters, aided by DFT calculations and ETS-NOCV studies, provided insight into the properties of the {N(CF3)2}- ligand. The bis(trifluoromethyl)amido ligand is a weaker σ-donor than related nonfluorinated dialkylamido ligands, for example {N(CH3)2}- and {NiPr2}-. In addition, the salts [Ag(IDipp)2]+([Ag{N(CF3)2}2]-)0.25(Cl-)0.75, [Ag(ItBu)2]+(HF2)-, {[tBu2Im]+}2{N(CF3)2}-(HF2)-, and [tBu2Im]+(HF2)- were characterized by SCXRD.
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