S1 Supporting Information Radical-Molecule Reactions for Aromatic Growth: a Case Study for Cyclopentadienyl and Acenaphthylene Dong Wang and Angela Violi * Department of Mechanical Engineering University of Michigan, Ann Arbor, MI 48104 * Corresponding author. E-mail: avioli@umich.edu Cartesian coordinates of the intermediates and transition structures optimized at B3LYP/6-31G(d,p) level, total and zero- point energies are given for the reaction pathways of acenaphthylene and cyclopentadienyl radical addition.