S1 Supporting Information Effects of closo-Icosahedral Periodoborane Salts on Hypergolic Reaction of 70% H2O2 with Energetic Ionic Liquid Ajay Kumar Chinnam, a§ Natan Petrutik, a§ Kangcai Wang, a Avital Shlomovich, a Olga Shamis, a Daniel Shem Tov, a Muhamed Sućeska, b Qi-Long Yan, c * Roman Dobrovetsky, a * and Michael Gozin. a * § Equal contribution. Affiliation a School of Chemistry, Faculty of Exact Science, Tel Aviv University, Tel Aviv, 69978, Israel; b Department of Mining and Engineering and Geotechnics, Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia. c Science and Technology on Combustion, Thermostructure, and Internal Flow Laboratory, Northwestern Polytechnical University, Xian 710072, China. Table of Contents Experimental Section……………………………………………………………………..S2 NMR and FTIR spectra …………………………………………………………………..S3-S5 X-ray Crystallography……………………………………………....……………………..S6-S8 Hirshfeld Surface Analyses………………………………….………..……………………S9 Ignition Tests and Related Analyses……………………………………………………….S10-S12 DFT Calculations…………………………………………………………………………..S14-S24 References……………………………………………………………………….…………S24 Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is © The Royal Society of Chemistry 2018