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Synthesis of Gold(I)−Trifluoromethyl Complexes and their Role in Generating Spectroscopic Evidence for a Gold(I)−Difluorocarbene Species |
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| Authors: | Sofie M P Vanden Broeck Dr David J Nelson Dr Alba Collado Dr Laura Falivene Prof Dr Luigi Cavallo Dr David B Cordes Prof Alexandra M Z Slawin Prof Dr Kristof Van Hecke Prof Dr Fady Nahra Prof Dr Catherine S J Cazin Prof Dr Steven P Nolan |
| Institution: | 1. Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Gent, Belgium;2. WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde Thomas Graham Building, 295 Cathedral Street, Glasgow, G1 1XL Scotland;3. EaStCHEM School of Chemistry, University of St Andrews, St Andrews, KY16 9ST UK
Departamento de Química Inorgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain;4. Universita' di Salerno, Dipartimento di Chimica e Biologia, Via Papa Paolo Giovanni II, 84100 Fisiciano, SA, Italia;5. EaStCHEM School of Chemistry, University of St Andrews, St Andrews, KY16 9ST UK |
| Abstract: | Readily prepared and bench-stable Au(CF3)(NHC)] compounds were synthesized by using new methods, starting from Au(OH)(NHC)], Au(Cl)(NHC)] or Au(L)(NHC)]HF2 precursors (NHC=N-heterocyclic carbene). The mechanism of formation of these species was investigated. Consequently, a new and straightforward strategy for the mild and selective cleavage of a single carbon/fluorine bond from Au(CF3)(NHC)] complexes was attempted and found to be reversible in the presence of an additional nucleophilic fluoride source. This straightforward technique has led to the unprecedented spectroscopic observation of a gold(I)−NHC difluorocarbene species. |
| Keywords: | difluorocarbenes fluoride abstraction gold(I) N-heterocyclic carbenes trifluoromethyl |