S1 Supporting Information Title: Oxygen Bridged Hybrid Metallocene-Nonmetallocene Polymetallic Catalysts of Group 4 Metals for Bimodal Activity in Olefin Polymerization: Synthesis, Characterization, and Theoretical Investigation Authors: Swadhin K. Mandal, † Prabhuodeyara M. Gurubasavaraj, † Herbert W. Roesky, † * Gerald Schwab, † Dietmar Stalke, † Rainer B. Oswald, § and Volker Dolle $ † Institute of Inorganic Chemistry, University of Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany) § Institute of Physical Chemistry, University of Göttingen, Tammannstrasse 6, 37077 Göttingen (Germany) $ Basell R & D Polymer Physics and Characterization, Industriepark, Hoechst, Frankfurt (Germany) * Author to whom correspondence should be addressed. E-mail: hroesky@gwdg.de