Abstract
Reactive scattering of F atoms with Cl2 molecules has been studied at an initial translational energy E ∼ 32 kJ mol-1, using a supersonic beam of F atoms seeded in He buffer gas. Laboratory angular and velocity distributions of FCl product have been measured which show scattering peaking sharply in the forward direction with a smaller backward peak of relative height ∼0·3 ± 0·1. The product translational energy for scattering in the forward and backward directions is greater than that for the sideways scattering by a factor ∼2. Reaction proceeds via a short-lived collision complex with a lifetime ∼0·5 rotational periods for complexes rotating in the plane of collision. Bent structures are proposed for the collision complex and the reactant transition state, which relate the observed scattering to the initial orientation of the reactant Cl2 molecule with respect to the incident F atom direction.
Published Version
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