نبذة مختصرة : A cationic nickel complex of the bis(8-quinolyl)(3,5-di-tert-butylphenoxy)phosphine (NPN) ligand, [(NPN)NiCl]+, is a precursor to efficient catalysts for the hydrosilation of alkenes with a variety of hydrosilanes under mild conditions and low catalyst loadings. DFT studies reveal the presence of two coupled catalytic cycles based on [(NPN)NiH]+ and [(NPN)NiSiR3]+ active species, with the latter being more efficient for producing the product. The preferred silyl-based catalysis is not due to a more facile insertion of alkene into the Ni–Si (vs. Ni–H) bond, but by consistent and efficient conversions of the hydride to the silyl complex.
Relation: NFR/262695; http://urn.nb.no/URN:NBN:no-87709; Yang, Jian Postils, Verònica Lipschutz, Michael I. Fasulo, Meg Raynaud, Christophe Clot, Eric Eisenstein, Odile Tilley, T. Don . Efficient alkene hydrosilation with bis(8-quinolyl)phosphine (NPN) nickel catalysts. The dominant role of silyl-over hydrido-nickel catalytic intermediates. Chemical Science. 2020, 11(19), 5043-5051; http://hdl.handle.net/10852/85024; 1882844; info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemical Science&rft.volume=11&rft.spage=5043&rft.date=2020; Chemical Science; 11; 19; 5043; 5051; https://doi.org/10.1039/d0sc00997k; URN:NBN:no-87709; Fulltext https://www.duo.uio.no/bitstream/handle/10852/85024/2/d0sc00997k.pdf
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