S1 Supporting Information for the Article entitled Synthesis and Formal Ring-Opening Reactions of (η 5 -C 5 Me 5 )Zr[η 2 -CH 2 CH (C 6 H 5 )][N( i Pr)C(Me)N( i Pr)]: A Base-Free, η 2 -Styrene Complex of Zirconium authored by Denis A. Kissounko, Albert Epshetyn, James C. Fettinger and Lawrence R. Sita* Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742 Details of the crystallographic analyses of 2, 3, 4, 5b, 6a, and 7, including tables of atomic positions, isotropic thermal parameters, and anisotropic thermal displacement coefficients (90 pages).