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Open AccessArticle

Dinuclear Gold Complexes Supported by Wide Bite Angle Diphosphines for Preorganization-Induced Selective Dual-Gold Catalysis

1
Homogeneous, Supramolecular, and Bio-inspired Catalysis, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
2
Small Molecule X-ray Laboratory, Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218, USA
*
Author to whom correspondence should be addressed.
Inorganics 2019, 7(3), 28; https://doi.org/10.3390/inorganics7030028
Received: 29 January 2019 / Revised: 14 February 2019 / Accepted: 20 February 2019 / Published: 26 February 2019
(This article belongs to the Special Issue Binuclear Complexes)
The synthesis, reactivity, and potential of well-defined dinuclear gold complexes as precursors for dual-gold catalysis is explored. Using the preorganizing abilities of well-known wide bite angle diphosphine ligands, DBFPhos and DPEPhos, dinuclear Au(I)–Au(I) complexes 1 and 2 are used as precursors to form well-defined monocationic species with either a chlorido- or acetylido-ligand bridging the two gold centers. These compounds are active catalysts for the dual-gold heterocycloaddition of a urea-functionalized alkyne, and the preorganization of both Au-centers affords efficient σ,π-activation of the substrate, even at high dilution, significantly outperforming benchmark mononuclear catalysts. View Full-Text
Keywords: dinuclear gold complex; wide bite-angle diphosphine ligand; dual-gold catalysis; bridging acetylide; σ,π-activation dinuclear gold complex; wide bite-angle diphosphine ligand; dual-gold catalysis; bridging acetylide; σ,π-activation
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MDPI and ACS Style

Lankelma, M.; Vreeken, V.; Siegler, M.A.; van der Vlugt, J.I. Dinuclear Gold Complexes Supported by Wide Bite Angle Diphosphines for Preorganization-Induced Selective Dual-Gold Catalysis. Inorganics 2019, 7, 28.

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