Abstract
Using the newly constructed photoelectron-photoion coincidence apparatus associated with the chemical dynamics beamline at the advanced light source, we have performed a high resolution energy-selected kinetic energy release measurement for the dissociative photoionization process SF6+hν→SF5++F+e−. After taking into account the center-of-mass kinetic energy release, the thermochemical threshold for this process is determined to be 14.11±0.08 eV. This value yields 18.5±1.9 and −202.9±2.2 kcal/mol for the heats of formation at 0 K for SF5+ and SF5, respectively.
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