Recently, different nitrato-methyl-substituted oxadiazoles have been described as potential melt-cast explosives. In this work, corresponding N–O heterocyclic-based compounds with azido-methyl functionalities were synthesized. In each case, the explosophoric azide group is inserted by chlorine–azide exchange during the last synthetic step. All synthesized compounds show interesting characteristics for various applications in the field of energetic materials as energetic plasticizers or as melt-cast explosives. The compounds were extensively analyzed by IR, EA DTA, and multinuclear NMR spectroscopy. Furthermore, the solid compounds 4,4′,5,5′-tetrakis­(azidomethyl)-3,3′-bisisoxazole (2) and 3,3′-bis­(azidomethyl)-5,5′-bis­(1,2,4-oxadiazole) (4) were characterized using X-ray diffraction. In addition, the sensitivities toward friction and impact were determined with BAM standard techniques, and the energetic performances of all synthesized azido-methyl compounds were calculated using the EXPLO5 code. The properties were compared to recently published, structurally related compounds.

Despite its potential importance for bacterial virulence, protein rhamnosylation has not yet been sufficiently studied. Specific anti-SerRha, anti-ThrRha and anti-AsnRha antibodies allowed the identification of previously unknown monorhamnosylated proteins in...

With the synthesis of 5-(1-hydroxy-3-nitro-1,2,4-triazol-5-yl)-1-hydroxy-tetrazole (1) we can report the first successful production of a combined bis-heterocyclic system composed of 1 hydroxy-tetrazole and 1-hydroxy-1,2,4-triazole. The straightforward synthesis modifies the cyano...

The SSRT setup gives smart access to test various properties of explosive materials and requires only little substance quantities. Unlike the standardized SSRT, we studied the bulge development from the blast of different amounts of PETN (200–1300 mg). The bulge of the corresponding aluminum blocks was evaluated with the help of a profilometer (Keyence VR‐5200). This device, which measures the volume of the dents using the offset of structured light projected on the object, has allowed us to analyze the differences precisely. Despite the experimental limitations and the resulting undirected explosion direction, a throughout linear correlation between the respective amounts of PETN and the resulting dent depth could be determined. Our study thus forms an illustrative development of how the explosion behavior, represented by the dent of an aluminum block, of compressed energetic materials behaves in with increasing filling quantity, which is transferable to larger experimental setups as well as to other explosives.

1,5-Diaminotetrazole is one of the most prominent high-nitrogen tetrazole compounds described in literature. Interestingly the isomer 2,5-diaminotetrazole is nearly undescribed due to its challenging synthetic routes. 2,5-Diaminotetrazole (1) was successfully...