Iridium Complexes That Break Bonds and Add Oxygen
A team of chemists has synthesized a fresh set of iridium complexes by removing a methyl group from older ionic precursors.
These neutral species—named 3 and 4—feature a large carbon ring and a side group that can be either chlorine or iodine.
Building Mixed‑Metal Architectures
Using 3 and 4, the researchers constructed unusual mixed‑metal frameworks that pair iridium with zinc, and occasionally ruthenium. These hybrid structures showcase the versatility of the new complexes.
Dual Bond Transformation on Heating
When heated, 3 or 4 undergo a simultaneous:
- Cleavage of the C–X bond (where X = halogen)
- Installation of an oxygen atom at the former methyl position
At the same time, the original iridium–chlorine linkage is replaced by a new halogen bond. The team meticulously monitored both transformations to gain insight into the mechanisms of bond scission and reformation.
Implications
The dual activity—breaking a carbon–halogen bond while installing oxygen—highlights the potential of these iridium complexes for:
- Advanced material synthesis
- Catalyst development
Their ability to perform two distinct chemical operations concurrently could pave the way for novel processes with valuable properties.
