Bis‐NHC Chelate Complexes of Nickel(0) and Platinum(0) |
| |
Authors: | Matthias Brendel Carolin Braun Dr Frank Rominger Prof Dr Peter Hofmann |
| |
Institution: | 1. Institute of Organic Chemistry, Ruprecht‐Karls‐University Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany);2. Catalysis Research Laboratory (CaRLa), Im Neuenheimer Feld 584, 69120 Heidelberg (Germany) |
| |
Abstract: | For a long time d10‐ML2 fragments have been known for their potential to activate unreactive bonds by oxidative addition. In the development of more active species, two approaches have proven successful: the use of strong σ‐donating ligands leading to electron‐rich metal centers and the employment of chelating ligands resulting in a bent coordination geometry. Combining these two strategies, we synthesized bis‐NHC chelate complexes of nickel(0) and platinum(0). Bis(1,5‐cyclooctadiene)nickel(0) and ‐platinum(0) react with bisimidazolium salts, deprotonated in situ at room temperature, to yield tetrahedral or trigonal‐planar bis‐NHC chelate olefin complexes. The synthesis and characterization of these complexes as well as a first example of C? C bond activation with these systems are reported. Due to the enforced cis arrangement of two NHCs, these compounds should open interesting perspectives for bond‐activation chemistry and catalysis. |
| |
Keywords: | carbene ligands chelates nickel platinum |
|
|