Hydrogen Bromide Radical Addition to Isobutene-Termination Steps

^{Click the structures and reaction black arrows in sequence to view the 3D models and animations respectively}

NOTE: Important charges and non-bonding electrons are shown throughout the animation except during the transition state phase.

The two termination steps shown are representative of radical coupling terminations whereby two radicals react together to form an adduct of the reactants and terminate the radical chains.

C. P. Jasperse, D. P. Curran and T. L. Fevig, Chem. Rev., 1991, 91, 1237–1286.