[Rh(II)2(CO3)4]xLn− with L = H2O, N-methylpyrazinium+, N-methyl-4,4´-bipy+ have been studied.
These complexes are characterized by MLCT interactions.
With L = H2O a photolysis takes place.
While Rh(II) is photoxidized, carbonate is photoreduced to CO.