Nano/HEDM Technology: Late Stage Exploratory Effort

摘要

This work is focused on a continued, escalating effort to develop new energetic functional groups which offer enhanced energy, oxygen balance, and density in that order of priority. A continuation of the study of addition of nitrene precursors to N,N-dialkyl nitrosamines is described; the nitrene derived from 1-amino-3,5-dinitro-1 ,2,4-triazole has been approached by oxidation of the parent amine. Initial results were not successful; aminodinitrotriazole in the presence of lead tetra-acetate does not produce detectable yields of dinitrotriazolyl azoxy dimethyl amine when aminodinitrotriazole and lead tetra- acetate are reacted in the presence of N,N-dimethylnitrosamine. The synthesis of the 5-nitrotetrazole-2-N-oxide anion has been realized and optimized; it is carried out in water/potassium acetate buffer, and proceeds in 90% yield; due to the small enthalpy of this oxidation, scale up and heat dissipation do not present a problem. The density of hydroxyl ammonium 5-nitrotetrazole-2-oxide is 1.82 g/cc; its enthalpy of formation is +40 kcal/mole. Finally, a practical pathway to 1-alkoxy-5-amino tetrazoles has been developed; it is hoped that this will enable the synthesis of 5-nitrotetrazole-1 ,3-bis-N-oxides, a family of unprecedented materials with excellent heats of formation and oxygen balance that rivals ammonium perchlorate and ammonium dinitramide.