Versatility and remarkable hypergolicity of exo-6, exo-9 imidazole-substituted nido-decaboraneElectronic supplementary information (ESI) available: Checkcif report of 1-5. CCDC 1546097-1546101. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c7cc03322b

The combination of an energetic imidazole bonded to a hypergolic trigger, such as certain boron hydride clusters, dramatically improves both the energy density and ignition delay of the resulting compounds while also introducing tunability via alkyl group substitution as demonstrated here with (Rim) 2 B 10 H 12 (R = H, C 1 , C 2 , and C 4 ). The tunability of azoles combined with boranes provides a platform for controlling the physicochemical properties of new energetic materials.