Sandl, Sebastian and Maier, Thomas M. and van Leest, Nicolaas P. and Kroencke, Susanne and Chakraborty, Uttam and Demeshko, Serhiy and Koszinowski, Konrad and de Bruin, Bas and Meyer, Franc and Bodensteiner, Michael and Herrmann, Carmen and Wolf, Robert and Jacobi von Wangelin, Axel (2019) Cobalt-Catalyzed Hydrogenations via Olefin Cobaltate and Hydride Intermediates. ACS CATALYSIS, 9 (8). 7596-+. ISSN 2155-5435,
Full text not available from this repository. (Request a copy)Abstract
Redox noninnocent ligands are a promising tool to moderate electron transfer processes within base-metal catalysts. This report introduces bis(imino)acenaphthene (BIAN) cobaltate complexes as hydrogenation catalysts. Sterically hindered trisubstituted alkenes, imines, and quinolines underwent clean hydrogenation under mild conditions (2-10 bar, 20-80 degrees C) by use of the stable catalyst precursor [((Dipp)BIAN)CoBr2] and the cocatalyst LiEt3BH. Mechanistic studies support a homogeneous catalysis pathway involving alkene and hydrido cobaltates as active catalyst species. Furthermore, considerable reaction acceleration by alkali cations and Lewis acids was observed. The dinuclear hydridocobaltate anion with bridging hydride ligands was isolated and fully characterized.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | IRON COMPLEXES; ATOM TRANSFER; HOMOGENEOUS CATALYSIS; ELECTRONIC-STRUCTURES; METAL; LIGANDS; NANOPARTICLES; REDUCTION; CHEMISTRY; MECHANISM; hydrogenation; cobalt; hydrides; metalloradicals; reaction mechanism; redox-active ligands |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Prof. Dr. Robert Wolf |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Apr 2020 06:00 |
| Last Modified: | 07 Apr 2020 06:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26519 |
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