Fast (nanosecond) time-resolved infrared spectroscopy has been used to follow the visible (532 nm) and UV (308 nm) flash photolysis of trans-[CpMo(CO)3]2 (Cp = η5-C5H5), in n-heptane solution, at room temperature. With visible irradiation, the primary photoproducts observed, on this time scale, are CpMo(CO)3 (major) and gauche-[CpMo(CO)3]2. The CpMo(CO)3 radical dimerizes (k2 = 3(±1) x 109 M-1 s-1) to form both trans- and gauche-[CpMo(CO)3]2. The gauche-[CpMo(CO)3]2 isomer decays (k = 2(±0.5) x 102 s-1 to the more stable trans isomer. Upon UV flash photolysis the CO-loss intermediate, Cp2Mo2(CO)5, is observed as a primary photoproduct together with the CpMo(CO)3 radical and gauche-[CpMo(CO)3]2.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry