The pivot point placement defining the multifaceted dividing surface for CF 3 + CF 3 are illustrated as a representative example in Figure . The front-to-front path, with the two maximum density radical lobes pointing toward each other, is the most energetically favorable approach. Lower steric effects are also expected for this path. At low temperatures, the front-to-front contribution to the total flux is about 60-65%, the front-to-back and back-to-front contributions are roughly 15% each, and the contribution of the back-to-back approaches is already minimal at around 5-10%. At 1000 K, the back-to-front and front-toback contributions are about 5% each, and the back-to-back contribution is negligible. At 2500 K, the back-to-front and front-to-back contributions decreases to about 2% each.