. The theoretically predicted pressure-dependent rate constants for 2 CF 3 --→ ←--C 2 F 6 are plotted in Figure . Room temperature experimental data are also plotted in this figure. Experimental data at higher temperatures involve substantive and likely unreliable pressure extrapolations and are in considerable discord with the present results (more than an order of magnitude). Even room-temperature experimental reports vary by about one order of magnitude despite similar experimental conditions. Furthermore, the variation in the experimental results with pressure appears more or less random. The present results are within this range, validating the appropriateness of the chosen scheme to describe the radical-radical 20 interaction potential. At room temperature, the VRC-TST calculation predicts virtually no pressure dependence. In fact, under temperatures of 800-900 K, the rate constant at 0.001 atm is within approximately a factor of two of the high-pressure limit rate coefficient. Above this temperature, the falloff behavior becomes more significant.