Product energy distributions for the four-center HF elimination from 1,1-difluoroethylene. A direct dynamics study

Product energy distributions (PEDs) were computed on the four-center HF eli mination from 1,1-difluoroethylene by using direct trajectory calculations. The vibrational and rotational populations of HF obtained with a quasi-cla ssical normal mode/rigid rotor excitation model compare very well with the experimental results. Also, the translational energy distributions obtained with an efficient microcanonical sampling (EMS) at the barrier are in exce llent accord with experiment and do not substantially change as the excitat ion energy increases. (C) 2001 Elsevier Science B.V. All rights reserved.