Transient infrared spectroscopy of (η5−C5 H5)Co(CO)2 photoproduct reactions in hydrocarbon solutions

Ultrafast photochemistry of CpCo(CO)2 in n-hexane, 1-hexene, and solvent mixtures (298 K) are reported. Multichannel infrared spectra (0.4 ps, 4 cm−1 resolution) identify the vibrational cooling of CpCo(CO)(n-hexane) and CpCo(CO)(1-hexene). The conversion rate of transient n-hexane species to stable 1-hexene product for 0.2–2.0 mol/liter 1-hexene/n-hexane solutions (k=1.4±0.2×1010 M−1 s−1) was determined.