Three energetic salts based on oxy-bridged bis( gem -dinitro) furazan: Syntheses, structures and thermal behaviors

Synthesis and crystal structure of trinuclear potassium(I) complex with oxy-bridged bis(gem-dinitro)furazan and triaminoguanidinium

“…The absorption bands at approximately 3464, 3369, 3321, 999, 963, 868, 823 and 747 cm -1 are observed, which are similar to the complexes [15]. The absorption bands in the range of 3500-3300 cm -1 are assigned to the symmetric N-H stretching vibrational models of the nitrogen-rich cations.…”

“…These bond data are between C-C single bond (1.530 Å) and C=C double bond (1.320 Å) [25]. These might indicate conjugation of negative charge throughout the aromatic rings [15,21]. (1) + ion (a), K(2) + ion (b) and K(3) + ion (c) in the complex.…”

“…The material oxy-bridged bis(gem-dinitro)furazan (OBNF) was synthesized according to the reported procedure [15,16].…”

“…It was noted that the 13 C NMR signal of gem-dinitro group carbon (C(NO 2 )) at 119.0 ppm appeared at higher field compared to the ones in literature (129 to 132 ppm) [22][23][24], which resulted from the conjugation of negative charge throughout the aromatic rings [21]. 1 H NMR (a) and 13 C NMR (b) spectra for the potassium(I) complex in DMSO ) cation, three potassium cation As to the anion, the bridged oxygen atom is nearly C5-N6 he dihedral angle between two furazan ring planes (defined by C2C3N4O5N3 and C5C4N5O7N6) between two furazan ring planes is 33.48 o , while one (defined by C8C9N11O16N12 and C10C11N13O18N14) is only 14.48 o , which are similar to the reported oxy-bridged furazan structures [15]. The length of the C-C bonds (C2-C3, C4-C5, C8-C9 and C10-C11) connecting gem-dinitro and furazan ring are 1.420, 1.426, 1.420 and 1.422 Å, respectively.…”

“…In this regard, compounds such as, nitramine or tetrazole-functionalized based furazan had been investigated and were found to have shown promising performance [7][8][9][10][11][12]. The gem-dinitro group has been reported as being an effective anion to construct gem-dinitro group containing energetic compounds, with the high value of density contribution of 1.759 g cm -3 [13][14][15]. To the best of our knowledge, the way of introducing gem-dinitro group into furazan ring to construct energetic compound is an effective strategy for developing novel energy material.…”