Angular distributions and relative total cross sections were measured for products of the collisions of F2 with C6 H6 at relative collision energies of 14 to 26 kcal mol−1 . The most conspicuous product is the ipso-fluorocyclohexadienyl radical i-C6 H6 F ̇, which displays a rather narrow peak very near the center-of-mass angle at all collision energies studied. Product C6 H5 F is masked at M/e=96 by dissociative ionization of C6 H6 F ̇ near the center-of-mass angle, but becomes observable at smaller angles to which little or no C6 H6 F ̇ is scattered. This means that at least one reaction C6 H6 +F2 →C6 H5 F+HF occurs, and does so in such a way that the products acquire high translational energies. The dependence on collision energy of the total cross section for the production of C6 H6 F ̇ was probably measured, and displays a well-marked onset at 13.9±0.3 kcal mol−1. The center-of-mass system means final state translational energy as a function of collision energy was obtained from the angular distributions and goes to zero at 13.9±0.5 kcal mol−1 . This probably means that the onset is a true threshold, from which the heat of formation of the ipso-fluorocyclohexadienyl radical is calculated to be 14.8±0.4 kcal mol−1. The mean final state translational energy asymptotically approaches 3.7 kcal mol−1 as the collision energies are increased, which is so large that only a fraction of the vibrational modes of C6 H6 F ̇ can be involved in the energy partitioning. This conclusion is confirmed by the center-of-mass angular distribution, which favors forward scattering of product F atoms, but only by about 10%–30%. This work shows that the crossed-beam method can be used to make precision thermochemical measurements of gaseous polyatomic free radicals. It also reports the investigation of a polyatomic–polyatomic reaction in crossed beams, for which type of study there are still very few examples.