1,1-Digoldallylium Complexes

  • Author: ChemistryViews.org
  • Published: 10 March 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Journal of the American Chemical Society/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: 1,1-Digoldallylium Complexes

A. Stephen K. Hashmi and colleagues, Heidelberg University, Germany, have synthesized extremely reactive 1,1-digoldallylium complexes (pictured, NHC = N-heterocyclic carbene). The NHC ligands used were IPr (1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) derivatives. The team reacted (NHC)(cyclopropenyl)gold(I) complexes with cationic gold(I) complexes of the type [(IPr)Au]+ and obtained the 1,1-digoldallylium complexes in a ring-opening reaction.


The researchers confirmed the existence of these intermediates using UV−Vis−NIR spectrophotometry, NMR spectroscopy, and mass spectrometry. They were also able to capture the 1,1-digoldallylium complex with dimethylsulfoxide as a sulfoxonium species that is stable enough for X-ray crystallographic analysis. Density-functional theory (DFT) calculations were used to investigate the bonding situation in the 1,1-digoldallylium complex. The team found electron delocalization along the Au−C−Au region. The bonding can be described as a three-center−four-electron bond.


The 1,1-digoldallylium complexes can be considered a coordination compound of carbon with a previously unknown structure. According to the researchers, the reactivity of this kind of complex should be further investigated.


 

Article Views: 1195

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH