Bis‐NHC Chelate Complexes of Nickel(0) and Platinum(0)1. Issue 33 (21st May 2014)

• Record Type: Journal Article
• Authors: Brendel, Matthias; Braun, Carolin; Rominger, Frank; Hofmann, Peter
• Is Part Of: Angewandte Chemie international edition. Volume 53:Issue 33(2014)
• Page Start: 8741
• Page End: 8745
• Publication Date: 2014-05-21
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201401024
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 <italic>cis</italic> arrangement of two NHCs, these compounds should open interesting perspectives for bond‐activation chemistry and catalysis.</p> </abstract>