Hybridization of Dinitramide and Dicyanamide: Evaluation of Nitrocyanamide in Energetic Salts and Coordination Compounds

Gruhne, Michael; Benz, Maximilian; Lorenzen, Tizian; Lenz, Tobias; Klapoetke, Thomas M. und Stierstorfer, Joerg (2022): Hybridization of Dinitramide and Dicyanamide: Evaluation of Nitrocyanamide in Energetic Salts and Coordination Compounds. In: Crystal Growth & Design, Bd. 22, Nr. 1: S. 200-212

Abstract

In this work, the anion nitrocyanamide (NCA7), as a cross between the dinitramide and the dicyanamide anion, was investigated as a building block in various energetic materials. Apart from nonenergetic complexes, only the use in ionic liquids has been investigated so far. Consequently, the focus in this work was on the synthesis of energetic coordination compounds (ECC) involving tetrazole ligands as well on nitrogen-rich salts, which includes not only ammonium but also hydrazinium, hydroxylammonium, and triaminoguanidinium. During the formation of the salts, particular focus was also put on the possible formation of adducts with nitrogen bases. This was proven with the help of IR and NMR spectroscopy. The complexation resulted in two silver(I) and nine copper(II) complexes, which were studied not only in terms of their coordination geometries but also in terms of their energetic properties. Each compound was checked on purity using CHNO elemental analysis. In some cases, X-ray diffraction experiments were carried out to become clear about their final composition. Thermal stability measurements were carried out using differential thermal analysis (DTA) and, for selected substances, thermogravimetric analysis (TGA). The sensitivities toward impact and friction were determined according to BAM (Bundesanstalt für Materialforschung and -prufung) standard methods, together with measurements regarding sensitivity toward electrostatic discharge. Hot plate and hot needle tests were conducted for every metal salt and complex, whereas the detonation parameters of every nitrogen-rich salt were calculated using the EXPLOS code.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 1528-7483
• Sprache: Englisch