Taming of 3,4-Di(nitramino)furazan

Highly energetic 3,4-di­(nitramino)­furazan (<b>1</b>, DNAF) was synthesized and confirmed structurally by using single-crystal X-ray diffraction. Its highly sensitive nature can be attributed to the shortage of hydrogen-bonding interactions and an interactive nitro chain in the crystal structure. In order to stabilize this structure, a series of corresponding nitrogen-rich salts (<b>3</b>–<b>10</b>) has been prepared and fully characterized. Among these energetic materials, dihydrazinium 3,4-dinitraminofurazanate (<b>5</b>) exhibits a very promising detonation performance (<i>νD</i> = 9849 m s^–1; <i>P</i> = 40.9 GPa) and is one of the most powerful explosives to date. To ensure the practical applications of <b>5</b>, rather than preparing the salts of <b>1</b> through acid-base reactions, an alternative route through the nitration of <i>N</i>-ethoxycarbonyl-protected 3,4-diaminofurazan and aqueous alkaline workup was developed