I hope all is well. My students have prepared trans-Rh(PPh3)2Cl(CO) in the lab and I have found an overall reaction for this experiment. I am thinking about the actual mechanism for this neat reaction. The first step you add hydrated rhodium(III) chloride to DMF and heat it until it changes into a yellow color. At this point, [Rh(CO)2Cl2]- is being generated in solution? I know the CO is coming from DMF.