Reversible H_2 Addition across a Nickel−Borane Unit as a Promising Strategy for Catalysis
- Creators
- Harman, W. Hill
- Peters, Jonas C.
Abstract
We report the synthesis and characterization of a series of nickel complexes of the chelating diphosphine-borane ligands ArB(o-Ph_2PC_6H_4)_2 ([^(Ar)DPB^(Ph)]; Ar = Ph, Mes). The [^(Ar)DPB^(Ph)] framework supports pseudo-tetrahedral nickel complexes featuring η^2-B,C coordination from the ligand backbone. For the B-phenyl derivative, the THF adduct [^(Ph)DPB^(Ph)]Ni(THF) has been characterized by X-ray diffraction and features a very short interaction between nickel and the η^2-B,C ligand. For the B-mesityl derivative, the reduced nickel complex [^(Mes)DPB^(Ph)]Ni is isolated as a pseudo-three-coordinate "naked" species that undergoes reversible, nearly thermoneutral oxidative addition of dihydrogen to give a borohydrido-hydride complex of nickel(II) which has been characterized in solution by multinuclear NMR. Furthermore, [^(Mes)DPB^(Ph)]Ni is an efficient catalyst for the hydrogenation of olefin substrates under mild conditions.
Additional Information
© 2012 American Chemical Society. Received: December 6, 2011. Publication Date (Web): March 1, 2012. This work was supported by the NSF Center for Chemical Innovation: Powering the Planet grant CHE-0802907, and by the Gordon and Betty Moore Foundation. We thank Professor Greg Fu for a helpful suggestion.Attached Files
Supplemental Material - ja211419t_si_001.cif
Supplemental Material - ja211419t_si_002.pdf
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Additional details
- Eprint ID
- 31601
- Resolver ID
- CaltechAUTHORS:20120523-074508665
- CHE-0802907
- NSF
- Gordon and Betty Moore Foundation
- Created
-
2012-05-23Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field
- Caltech groups
- CCI Solar Fuels