Synthesis and Properties of C8H24N4（ClO4）4 and C8H24N4（NO3）4∙2H2O

Two new explosives，C8H24N（4 ClO4）4 and C8H24N（4 NO3）4∙2H2O，were prepared from 1，4，7，10‐tetranitrocyclododec-ane by salt formation with nitric acid and perchloric acid respectively. The structures，thermal properties，and detonation performances of the target products were studied through single crystal X‐ray diffraction，infrared spectroscopy，elemental analysis，differential thermal analysis，thermogravimetric analysis，and EXPLO 5.0 program. Results indicate that C8H24N（4 ClO4）4 crystallizes in the orthogonal crystal system，Pcc2 space group with a crystal density 1.968 g∙cm‐3. The crystal of C8H24N（4 NO3）4∙2H2O is a dihydrate with a crystal density of 1.642 g∙cm-3，which belongs to the monoclinic crystal system P21/n space group. The thermal decomposition peak temperatures of C8H24N（4 NO3）4∙2H2O and C8H24N（4 ClO4）4 are 293.2 ℃ and 284.1 ℃，and activation energies are 131.76 kJ·mol-1 and 195.18 kJ·mol-1，respectively. Compounds C8H24N（4 NO3）4∙2H2O and C8H24N（4 ClO4）4 exhibit excellent detonation properties，showing very promising performance values （C8H24N4（NO3）4 ∙ 2H2O，D=8058 m ∙ s-1，p=24.0 GPa；C8H24N（4 ClO4）4，D=8680 m∙s-1，p=36.2 GPa）. Moreover，the impact sensitivities of C8H24N（4 NO3）4∙2H2O and C8H24N（4 ClO4）4 are 36 J and 33 J，respectively，and their friction sensitivities are higher than 360 N. © 2024 Institute of Chemical Materials, China Academy of Engineering Physics. All rights reserved.