Insensitive energetic compounds: alkaline earth metal salts of 5,5′-dinitramino-3,3′-methylene-1H-1,2,4-bistriazolate

Abstract

Three novel alkaline earth metal salts (Mg2+(1), Ca2+(2), Sr2+(3)) of 5,5′-dinitramino-3,3′-methylene-1H-1,2,4-bistriazolate (DNAMT) have been synthesized in a simple and straightforward manner. The crystal structures of 1-3 were confirmed by single-crystal...

Access to Green Pyrotechnic Compositions via Constructing Coordination Polymers: A New Approach to the Application of 3,4-Dinitropyrazole

“…The two pyrazole rings in the whole molecule are parallel with a distance of 1.6659 Å (Figure b). Like many reported magnesium salts, Mg 2+ is coordinated with six water molecules forming a regular octahedron, which can be demonstrated by the Mg–O bond lengths (2.045(2)–2.065(2) Å). By rotating Figure c, a distance of the π–π interactions of 3.3426 Å is obtained from Figure d.…”

“…The two pyrazole rings in the whole molecule are parallel with a distance of 1.6659 Å (Figure 6b). Like many reported magnesium salts, 43 Ca(DNP) 2 (H 2 O) 4 (MES-7) and Ba(DNP) 2 (H 2 O) 3 (MES-9) both crystallize in the monoclinic space group C2/c with four molecular units per unit cell (Z = 4). As observed in Figures 7a and 8a, the single molecular unit contains one metal center (Ca 2+ , Ba 2+ ), two DNP − , and coordinated water molecules (4 for MES-7, and 3 for MES-9).…”

Heat‐Resistant and Low Sensitivity Energetic Material Constructed with [1, 2, 4]Triazolo[4,3‐a]pyridine Framework

“…And the sensitivity of PTX ( IS =58 J, FS =324 N) is lower than HMX ( IS =7.4 J, FS =120 N). [1, 2, 4]triazolo‐pyridazine‐based 6,7‐diamino‐3,8‐dinitro‐[1,2,4]triazolo[4,3‐b]pyridazine ( 1 ) also possesses good detonation properties ( D =8994 m s −1 , P =34.1 GPa) and low sensitivity ( IS =20 J, FS >360 N) [16]. In addition, 1,2,4‐triazolo‐1,2,4,5‐tetrazine‐based N,N′‐([1,2,4]triazolo[4,3‐b][1,2,4,5]tetrazine‐3,6‐diyl)di‐nitramide ( 2 ) shows high detonation properties ( D =9301 m s −1 , P =38.8 GPa), but it has unsatisfactory thermal stability ( T d =138 °C) and high sensitivity ( IS =3 J, FS >5 N) [17].…”

“…As one of the categories of materials science, energetic materials have been extensively studied in recent years due to their wide application in propellants, explosives and pyrotechnic agents [1][2][3]. One of the most noteworthy challenges to be solved in this domain is how to achieve a balance among energy, stability and safety of energetic compounds [4]. In contrast to traditional energetic materials with benzene as a framework such as 2-methyl-1,3,5-trinitro benzene (TNT), nitrogen-rich conjugated fused heterocyclic skeletons with alternating amino and nitro groups possess higher density, preferable detonation performance and higher thermostability [5,6].…”

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In this study, fused [1,2,4]triazolo [4,3-a]pyridine framework was applied to construct a new energetic compound with high thermal stability and low sensitivity. 5- 3,5,2,4]triazolo[4,3-a]pyridin-3-amine (6) was synthesized by a simple method and fully characterized by NMR ( 1 H, 13 C), IR, elemental analysis, differential scanning calorimetry (DSC) and thermogravimetric (TG). The structure of compound 6 was further determined by X-ray diffraction.

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