Reactive scattering of Cl atoms with C3F7I molecules has been studied at an initial translational energyE= 47 kJ mol-1, using a supersonic beam of Cl atoms seeded in He buffer gas. Laboratory angular and velocity distributions of ICl product have been measured which show reaction proceeding via a long-lived collision complex. The forward and backward scattering has a higher product translational energy than the sideways scattering, with the intensity and energy of the forward scattering somewhat higher than the backward scattering. Long-lived collision dynamics first break down in collisions at large impact parameters with apparently incomplete energy transfer to internal modes of the C3F7radical.