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- Title
Synthesis and Reversible H<sub>2</sub> Activation by Coordinatively Unsaturated Rhodium NHC Complexes.
- Authors
Lutz, Marius D. R.; Zhong, Hongyu; Trapp, Nils; Morandi, Bill
- Abstract
We report the synthesis of coordinatively unsaturated cationic rhodium complexes bearing the sterically encumbered electron‐rich NHC ligand IPr*OMe. The COD (1,5‐cyclooctadiene) complex [Rh(IPr*OMe)(COD)]BF4 adopts a tilted, pseudo‐square planar coordination geometry, where bonding to the ipso‐carbon of the NHC aryl substituent was observed in the solid state. Hydrogenation of this complex afforded a metastable dihydride complex [Rh(IPr*OMe)(H)2]BF4 with an unusual internal coordination to an arene of the ligand. In the absence of a hydrogen atmosphere, spontaneous reductive elimination of H2 afforded a rhodium complex [Rh(IPr*OMe)]BF4 with a single chelating ligand that stabilizes the highly unsaturated metal by two‐fold π‐face donation as suggested by NMR spectroscopy and computational studies. This unusual complex might serve as a versatile precatalyst for a variety of transformations.
- Subjects
RHODIUM; HYDROGENATION
- Publication
Helvetica Chimica Acta, 2023, Vol 106, Issue 4, p1
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.202200199