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Updated: Sep 30, 2025
The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
Synthesis, structure, and electrochemical properties of [LNi(Rf)(C4F8)]- and [LNi(Rf)3]- complexes
Scott T Shreiber1, Fatema Amin1, Sascha A Schäfer2
1Department of Chemistry, Lehigh University, 6 E Packer Ave., Bethlehem, PA 18015, USA. vicic@lehigh.edu.
Abstract:
The new anionic nickelate complexes [(MeCN)Ni(C4F8)(CF3)]-, [(MeCN)Ni(C4F8)(C2F5)]-, [(IMes)Ni(C4F8)(CF3)]-, [(IMes)Ni(CF3)3]- (IMes = 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene), and [(F-NHC)Ni(Rf)3]- (F-NHC = 1,3-bis(2,4-F2Ph), 2,4,6-F3Ph- or 3,4,5-F3Ph)imidazol-2-ylidene; (Rf = CF3 or C2F5) were synthesized and structurally characterized. The electrochemical properties of all new compounds were revealed by cyclic voltammetry studies and compared to the known CF3 analogue [(MeCN)Ni(CF3)3]-. The IMes-coordinated complexes exhibited initial oxidation events that were well-separated from a second oxidation process in the cyclic voltammograms. The complexes containing F-substituted NHC ligands [(F-NHC)Ni(CF3)3]- are structurally quite similar to the IMes derivative and reveal also two separated oxidation waves in their cyclic voltammograms. The absolute potentials as well as the separation between the two waves vary with the substitution pattern, suggesting that the NHC ligand environment (NHC = N-heterocyclic carbene) is an interesting platform for the development of new redox-triggered reactions that release trifluoromethyl and perfluoroalkyl radicals upon oxidation.
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