Supporting Information Unexpected Reactions Between Ziegler-Natta Catalyst Components and Structural Characterization of Resulting Intermediates Piotr Sobota,* Józef Utko, Tadeusz Lis, Łukasz John, Rafał Petrus, and Anna Drąg-Jarząbek Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland. Corresponding author: Prof. Dr. Piotr Sobota, piotr.sobota@chem.uni.wroc.pl