Flash and continuous photolysis kinetic studies of the iron-iron hydrogenase model (μ-pdt)[Fe(CO)_3]_2 in different solvents

摘要

Flash and continuous photolysis studies of (μ-pdt)[Fe(CO) _3]_2 under excess CO were conducted in coordinating and noncoordinating solvents. The back-reaction of CO with the photoproduct showed second-order kinetics with k_(CO) values of 1.0 × 10~8, 3.4 × 10~6, 1.2 × 10~6, and 0.90 M~(-1) s~(-1) in hexanes, benzene, toluene, and THF, respectively. These data indicate a solvent-coordinated intermediate as one photoproduct, but other long-lived species were also apparent.