Time-resolved IR and X-ray spectroscopy as complementary electronic structure probes of photoinduced ligand-exchange

Photoinduced ligand-exchange dynamics in molybdenum hexacarbonyl have been studied using time-resolved IR and X-ray spectroscopy. We find that the energies of the unoccupied molybdenum 4d-derived orbitals that are accessed through X-ray transitions correlate with red-shifts in CO stretching modes. This provides complementary electronic structure information from the metal and the ligand perspective.