Ruthenium models of the [FeFe]-hydrogenase active site: seeking the terminal hydride

The [FeFe]-hydrogenase enzymes are some of the best catalysts know for generating hydrogen. We have an ongoing programme to understand how their chemistry works, and to replicate the core 'active site' of the enzyme. Recent literature reports have shown that replacing iron by ruthenium in the enzyme can allow isolation of a long sought 'terminal hydride' intermediate. Here, we will seek evidence that this intriguing compound can be seen by muon spectroscopy.