ADVERTISEMENT
2 /3 FREE ARTICLES LEFT THIS MONTH Remaining
Chemistry matters. Join us to get the news you need.

If you have an ACS member number, please enter it here so we can link this account to your membership. (optional)

ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members.

ENJOY UNLIMITED ACCES TO C&EN

Synthesis

Nitrenium Ligand Fills A Carbene Gap

by Stephen K. Ritter
July 4, 2011 | APPEARED IN VOLUME 89, ISSUE 27

Rhodium nitrenium complex
[+]Enlarge
08927-scicon-rhodium.jpg

Attaching a pair of phosphine arms onto a triazole skeleton has led to the first example of a transition-metal nitrenium complex. The nitrenium ion fills a missing link in the series of ubiquitous imidazole-based N-heterocyclic carbene (NHC) ligands (Nat. Chem., DOI: 10.1038/nchem.1068). NHCs, which were discovered 20 years ago, have opened up new pathways in catalysis and materials chemistry. The original NHCs spawned many derivatives, including imidazoles in which main-group elements such as silicon, germanium, boron, and phosphorus substitute for the carbene carbon atom. But until now, a version in which a nitrogen stands in for the carbene carbon and forms stable metal complexes had been elusive. Mark Gandelman of Technion—Israel Institute of Technology and coworkers determined that the pincerlike phosphine arms could embrace an electron-rich metal and then draw it close enough to coordinate to the nitrogen atom in the same way the metal would coordinate to the carbene carbon in a standard NHC. They prepared the rhodium complex shown, as well as a ruthenium version. The researchers continue to investigate the properties of the nitrenium complexes, and they plan to explore potential catalysis applications.

X

Article:

This article has been sent to the following recipient:

Leave A Comment

*Required to comment