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Gospodinov, Ivan; Hermann, Tobias; Klapötke, Thomas M.; Stierstorfer, Jörg (2018): Energetic Compounds Based on 3,4-Bis(4-nitramino-1,2,5-oxadiazol-3-yl)-1,2,5-furoxan (BNAFF). In: Propellants Explosives Pyrotechnics, Vol. 43, No. 4: pp. 355-363
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Abstract

3,4-Bis(4-amino-1,2,5-oxadiazol-3-yl)-1,2,5-furoxan (BAFF, 1) was nitrated in 100% HNO3 at -10 degrees C and then reacted with KOH to give the corresponding energetic dipotassium salt of 3,4-bis(4-nitramino-1,2,5-oxadiazol-3-yl)-1,2,5-furoxan (2, K(2)BNAFF). The neutral nitramino-furoxan compound (3, H(2)BNAFF) is unstable at room temperature and can be obtained from K(2)BNAFF with 2m HCl and ether as H(2)BNAFF0.5 Et2O. Several nitrogen-rich salts (e.g. ammonium, guanidinium, aminoguanidinium, hydrazinium and hydroxylammonium) were prepared from K(2)BNAFF. The potassium, guanidinium, aminoguanidinium, hydroxylammonium and silver salts of BNAFF were characterized by low-temperature X-ray diffraction. In addition, all compounds were analyzed by vibrational spectroscopy (IR and Raman), multinuclear (H-1, C-13, N-14) NMR spectroscopy, differential thermal analysis (DTA) and elemental analysis. The heats of formation for the anhydrous compounds were calculated using the atomization method based on CBS-4M enthalpies. Several detonation parameters were predicted by using the EXPLO5 code (V6.03). In addition, the sensitivities of all BNAFF salts toward friction, impact and electrostatic discharge were determined.