In the first propagation step of the bromination of 2,3-dimethylbutane, the newly formed br radicals react with the molecules of 2,3-dimethylbutane. give the major products formed by the first propagation step including both organic and inorganic products. draw the molecule on the canvas by choosing buttons from the tools (for bonds), atoms, and advanced template toolbars. include all free radicals by right-clicking on an atom on the canvas and then using the atom properties to select the monovalent radical.