Photodissociation of Mo(CO)(6) in a NaY zeolite was studied under vacu
um and CO atmosphere by FTIR. The stepwise CO-dissociation under vacuu
m proceeded to form Mo(CO)(3) via Mo(CO)(5) and Mo(CO)(4). The Mo(CO)(
6) was regenerated by introduction of CO to Mo(CO)(3). Irradiation und
er gaseous CO favored the formation of Mo(CO)(4).