The benzyl bromide scope (Table ) showed broad efficiency for coupling with α-methylstyrene to form quaternary carbons, even with ortho-substitution adjacent to the bromomethyl coupling site. As in the styrene scope, electron-rich and -deficient partners worked well. Hetereocycles, however, were restricted to low Lewis basicity/ low nucleophilicity motifs to prevent self-alkylation and coordinative deactivation of the iron catalyst. It is noteworthy that common methods to access 1,2-diarylethanes do not lead to quaternary carbons, and the less-common Kumada or Negishi 26b approaches rely on stoichiometric, neo-pentyl organometallics. In contrast, the quaternary carbons produced in Table , can be formed under mild conditions and in protic solvent.