Synthesis and Characterization of the New Heterocycle 5-(4-Amino-1,2,4-triazol-3-on-5′-yl)-1<i>H</i>-tetrazole and Some Ionic Nitrogen-Rich Derivatives
作者:Niko Fischer、Katharina Hüll、Thomas M. Klapötke、Jörg Stierstorfer
DOI:10.1002/jhet.1877
日期:2014.1
A newheterocycle consisting of a tetrazole ring attached to an amino‐triazolone ring, namely 5‐(4‐amino‐1,2,4‐triazol‐3‐on‐5′‐yl)‐1H‐tetrazole (3) as well as its ammonium (2), hydroxylammonium (3), and sodium salt (4), is introduced. Its ammonium salt (2) is formed starting from tetrazole‐5‐carboxamide oxime (1), which is reacted with diaminourea (carbonyldihydrazide) in aqueous media. All compounds
The Reactivity of 5-Cyanotetrazole towards Water and Hydroxylamine
作者:Niko Fischer、Thomas M. Klapötke、Sebastian Rappenglück、Jörg Stierstorfer
DOI:10.1002/cplu.201200136
日期:2012.10
using NMR and vibrational (IR, Raman) spectroscopy as well as mass spectrometry and elemental analysis. The thermal behavior was studied from DSC measurements and the sensitivities of the compounds towards shock, friction, and electrostatic discharge were determined. Moreover, the heats of formation were calculated (atomization method, CBS‐4M enthalpies) and several detonation/propulsion parameters computed
A Study of Cyanotetrazole Oxides and Derivatives thereof
作者:Franziska Boneberg、Angie Kirchner、Thomas M. Klapötke、Davin G. Piercey、Maximilian J. Poller、Jörg Stierstorfer
DOI:10.1002/asia.201200903
日期:2013.1
this work we report on the syntheses of energetic salts of cyanotetrazolate‐1‐ and ‐2‐oxides; this offers a unique ability to compare the effects of tetrazole 1‐ versus 2‐oxidation. 5‐Cyanotetrazolate‐2‐oxide can be synthesized by oxidation of the 5‐cyanotetrazolate anion with Oxone, while the corresponding 1‐oxide was synthesized by the rearrangement of azidoaminofurazan. Both chemical (multinuclear
Synthesis and Characterization of Energetic Salts of the (C<sub>4</sub>N<sub>12</sub><sup>2-</sup>) Dianion
作者:Thomas M. Klapötke、Davin G. Piercey、Florian Rohrbacher、Jörg Stierstorfer
DOI:10.1002/zaac.201200363
日期:2012.9.27
3, 6-Bis(tetrazol-5-yl)-1, 2, 4, 5-tetrazine is a nitrogen-rich energetic compound readily prepared and a strong dibasic acid. By the reaction with energetic bases such including hydroxylamine, triaminoguanidine, hydrazine, and diaminourea, multiple ionic energetic materials were prepared and characterized for the first time. Both chemical (multinuclear NMR, Infrared, Raman, MS, etc) as well as explosive
AbstractNew salts based on imidazolium, pyrrolidinium, phosphonium, guanidinium, and ammonium cations together with the 5‐cyanotetrazolide anion [C2N5]− are reported. Depending on the nature of cation–anion interactions, characterized by XRD, the ionic liquids (ILs) have a low viscosity and are liquid at room temperature or have higher melting temperatures. Thermogravimetric analysis, cyclic voltammetry, viscosimetry, and impedance spectroscopy display a thermal stability up to 230 °C, an electrochemical window of 4.5 V, a viscosity of 25 mPa s at 20 °C, and an ionic conductivity of 5.4 mS cm−1 at 20 °C for the IL 1‐butyl‐1‐methylpyrrolidinium 5‐cyanotetrazolide [BMPyr][C2N5]. On the basis of these results, the synthesized compounds are promising electrolytes for lithium‐ion batteries.