Crossed Molecular Beam Studies of the Fluorine Atom Reaction with Trans-1，3-butadiene

The fluorine atom reaction with trans-1，3-butadiene has been investigated by using the crossed molecular beam method. Signals at mass 72，46 and 33 have been observed. A single reaction channel C4H5F + H is observed for this reaction channel. Product angular distributions and velocity distributions are determined. The experimental results indicate that the channel mainly proceeds via a long-lived complex at a collisional energy of 23. 8 kJ / mol. The collision complex is likely formed with the F atom attacking the delocalized electrons in the direction perpendicular to the molecular plane of trans-1，3-butadiene molecule.