The Synthesis, Structure, and Properties of a Polynitro Energetic Complex with a Hexaamminecobalt(III) Ion as a Stabilizing Core.

Energetic complexes with multi-component architectures represent a frontier in contemporary energetic materials research. In this work, we report a novel high-energy complex-bis(5-nitro-3-(dinitromethyl)-1,2,4-triazole)-hexaamminecobalt(III) [Co(NH)(NTD)·HO]-that is synthesized using the oxygen-rich energetic compound 5-nitro-3-(trinitromethyl)-1,2,4-triazole (HNTF) as a precursor. Compared with metallic HNTD salts, Co(NH)(NTD)·HO exhibits a higher density ( = 1.886 g cm) and unrivaled energy properties ( = 8030 m s and = 29.2 GPa). The formation of a dense hydrogen-bonding network-mediated by ammonium groups in the [Co(NH)] core and nitro groups of HNTD and NTD-significantly dampens the mechanical sensitivity ( = 10 J and = 140 N). These combined attributes establish Co(NH)(NTD)·HO as a promising high-energy-density material (HEDM), offering critical insights for the design of next-generation energetic complexes.