INITIATION: Br2 --> 2Br . The breaking of the Br2 bond from ultraviolet radiation forms two radicals, as one electron from the bond pair goes to each bromine atom. This is called homolytic fission. PROPAGATION: C6H12 + Br . --> C6H11 . + HBr C6H11 . + Br2 --> C6H11Br + Br . There are multiple TERMINATION outcomes: C6H11 . + Br . --> C6H11Br C6H11 . + C6H11 . --> C12H22 Br . + Br . --> Br2