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In a second avenue of research we are trying to expand on research done by Dr. Kevin R. Grundy's group previously:
We wanted to extend this type of chemistry to the analogous heterobinuclear Rh-Ir system. Rhodium iridium complexes containing acetylides have been reported in the literature. Dr. Bernard L. Shaw, at Leeds, previously reported a reaction in which IrAg(CCPh)(CO)(dppm)2 reacted with Rh2 (CO)4Cl2 to give AgCl and a compound to which he assigned the formula: "RhIr(CO)2(CCPh)(dppm)Cl". Further chemical reactions and characterization were not pursued by Dr. Shaw's research group.
This compound proved to be identical (apart from the differing counterions) to the compound prepared in our research group via the following metathesis.
The route discovered by Dr. Shaw's research group is the one of choice for me due to greater yield and convenience. However, I perform an anion exchange in situ by reacting Dr. Shaw's compound with silver triflate (AgO3SCF3).
The compound of interest to me is finally prepared by the loss of carbon monoxide from the compound above to give the Rh-Ir analogue of Dr. Grundy's phenylacetylide complex.
The reactivity of this compound is being investigated, as well as the reactivity of the vinylidene derivative. I'm not going to say much about it on this page until it's closer to publication. Sorry, but I have to wait to get results, you can be patient and wait to read about them.