Articles you may be interested inVibronic-structure tracking: A shortcut for vibrationally resolved UV/Vis-spectra calculations

The photodissociation of Co(CO) 3 NO was studied near 225 nm. Apparent two-photon dissociation of the parent compound produces Co* in a number of excited states that emit in the range of 340-360 nm. Both quartet and doublet states of Co* are observed, implying the existence of spin-conserving and nonspinconserving dissociation channels. Assignment of the Co* emission is used to calculate an upper limit for the average metal-ligand bond dissociation energy of 36.2-38.6 kcal/mol with no spin-conservation restrictions and 41.2-43.9 kcal/mol with spin-conservation restrictions. The Co* emission intensities are used to determine the relative populations of particular J and spin states and to demonstrate that J states within a particular LS configuration are statistically populated. The NO photoproduct was detected by fluorescence excitation spectroscopy. The NO appears to follow dual Boltzmann statistics with rotational temperatures of 580 ( 70 K for E rot < 500 cm -1 and 2800 ( 300 K for E rot > 500 cm -1 .