Monomolecular decomposition of C3F7I and CF3I: Theory meets experiment

Abstract

Abstract For the first time, the rate constant of the thermal monomolecular decomposition of n-C3F7I in Ar was measured directly using the technique of atomic resonance absorption spectroscopy on a resonant line of iodine atom. Experiments were conducted behind the incident and reflected shock waves in a broad range of thermodynamic parameters (T = 800–1200 K and P = 0.6–8.3 bar). Experimental data were found to conform reasonably to the results of the Rice–Ramsperger–Kassel–Marcus theory master equation modeling based on the results of quantum chemical calculations. The obtained low- and high-pressure limiting rate constants for n-C3F7I and CF3I dissociation in Ar were reported. Third body efficiencies for Kr were also evaluated.