1. PtII−N-Heterocyclic Carbene Complexes in Solvent-Free Alkene Hydrosilylation
- Author
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Maliszewski, Benon P., Bayrakdar, Tahani A. C. A., Lambert, Perrine, Hamdouna, Lama, Trivelli, Xavier, Cavallo, Luigi, Poater, Albert, Beliš, Marek, Lafon, Olivier, van Hecke, Kristof, Ormerod, Dominic, Cazin, Catherine S. J., Nahra, Fady, Nolan, Steven P., Universiteit Gent = Ghent University (UGENT), Flemish Institute for Technological Research (VITO), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Lille, Sciences et Technologies, King Abdullah University of Science and Technology (KAUST), Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona (IQCC), and Universitat de Girona (UdG)
- Subjects
solvent-free catalysis ,alkenes ,hydrosilylation ,N-heterocyclic carbenes ,platinum ,[CHIM.INOR]Chemical Sciences/Inorganic chemistry - Abstract
International audience; Herein, we report the catalytic activity of a series of platinum(II) pre-catalysts, bearing N-heterocyclic carbene (NHC) ligands, in the alkene hydrosilylation reaction. Their structural and electronic properties are fully investigated using X-ray diffraction analysis and nuclear magnetic resonance spectroscopy (NMR). Next, our study presents a structure-activity relationship within this group of pre-catalysts and gives mechanistic insights into the catalyst activation step. An exceptional catalytic performance of one of the complexes is observed, reaching a turnover number (TON) of 970 000 and a turnover frequency (TOF) of 40 417 h−1 at 1 ppm catalyst loading. Finally, an attractive solvent-free and open-to-air alkene hydrosilylation protocol, featuring efficient platinum removal (reduction of residual Pt from 582 ppm to 5.8 ppm), is disclosed.
- Published
- 2023