Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 6, Issue 35, Pages 16833-16837Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta06199h
Keywords
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Funding
- Office of Naval Research [N00014-16-1-2089]
- Defense Threat Reduction Agency [HDTRA 1-15-1-0028]
- National Natural Science Foundation of China [21702017]
- Thousand Talents Plan of China (Youth)
- M. J. Murdock Charitable Trust, Vancouver, WA [2014120: MNL: 11/20/2014]
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Two different methods were developed to synthesize 4-amino-3-(5-acetic acid methyl ester-1,2,4-oxadiazolyl)-furazan (1), the precursor to prepare 4-nitramino-3-(5-dinitromethyl-1,2,4-oxadiazolyl)-furazanate, in scalable good yields. In four steps, three energetic salts were obtained with an overall yield of approximate to 50% and show promising characteristics of typical secondary explosives. The structure of the diammonium salt (2a) was confirmed by X-ray single crystal diffraction. It has a high crystal density of 1.840 g cm(-3) at 150 K and a measured density of 1.804 g cm(-3) at room temperature. All of the compounds were fully characterized by infrared spectroscopy (IR), H-1 NMR, and C-13 NMR spectroscopy as well as elemental analysis. Compound 2b and 2c exhibit better sensitivities and comparable detonation properties relative to HMX, showing great promise as replacements.
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