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Nitrogen-Rich Compounds (nitrogen-rich + compound)

Distribution by Scientific Domains

Chemistry	100%

Selected Abstracts

Synthesis, Characterization and Thermal Behaviour of Guanidinium-5-aminotetrazolate (GA) , A New Nitrogen-Rich Compound

PROPELLANTS, EXPLOSIVES, PYROTECHNICS, Issue 4 2003
Jochen Neutz
Abstract This work describes the synthesis and the thermoanalytical characterization of guanidinium-5-aminotetrazolate (GA). GA is a new nitrogen-rich energetic material. It is not mentioned in the chemical literature so far. The molecular structure of the compound has been determined by IR, 1H-, 13C- and 15N-NMR spectroscopy. The thermal properties, the decomposition pathways and its volatile products were investigated by thermal analysis and are discussed. [source]

Nitrogen-Rich Compounds of the Lanthanoids: Highlights and Summary

HELVETICA CHIMICA ACTA, Issue 2 2010
Georg Steinhauser
Abstract In this third part of our research on the 5,5,-azobis[1H -tetrazol-1-ides] (ZT) of the lanthanoids, we present two compounds with La2(ZT)3 moieties with very different coordination modes between the cations and the anions. One La2(ZT)3 -containing compound is interesting, because it contains trimeric La3(ZT)3III cations, which are arranged in a windmill-like structure. Moreover, the first double salt of a ZT compound, namely the carbonate compound La2(ZT)2(CO3),12 H2O, is presented and discussed. Another highlight of nitrogen chemistry is the first molecular structure of a 5-azido-2H -tetrazole (CHN7) molecule, in the form of the spectacular compound Dy2(ZT)3,4 CHN7,24 H2O. This is the first known complete molecular structure of an azidotetrazole molecule (the organic molecule with the highest nitrogen-content: 88.3% N). All compounds have been characterized completely including elemental analyses, vibrational (IR and Raman) spectroscopy, and X-ray crystal-structure determination. We summarize our ,nitrogen-rich compounds of the lanthanoids' project and extensively discuss selected literature on this topic and compare previously published results with ours. [source]

Nitrogen-Rich Compounds of the Lanthanoids: The 5,5,-Azobis[1H -tetrazol-1-ides] of some Yttric Earths (Tb, Dy, Ho, Er, Tm, Yb, and Lu)

HELVETICA CHIMICA ACTA, Issue 7 2009
Georg Steinhauser
Abstract A set of N-rich salts, 3,9, of the heavy lanthanoids (terbium, 3; dysprosium, 4; holmium 5; erbium, 6; thulium, 7; ytterbium, 8; lutetium, 9) based on the energetic 5,5,-azobis[1H -tetrazole] (H2ZT) was synthesized and characterized by elemental analysis, vibrational (IR and Raman) spectroscopy, and X-ray structure determination. The synthesis of the lanthanoid salts 3,9 was performed by crystallization from concentrated aqueous solutions of disodium 5,5,-azobis[1H -tetrazol-1-ide] dihydrate (Na2ZT,2,H2O; 1) and the respective Ln(NO3)3,5,H2O and yielded large rhombic crystals of the type [Ln(H2O)8]2(ZT)3,6,H2O in ca. 70% of the theoretical yield. The compounds 3,9 are isostructural (triclinic space group P) to the previously published yttrium salt 2; they show, however, a clear lanthanoid contraction of several crystallographic parameters, e.g., the cell volume or the LnO bond lengths of the Ln3+ ions and the coordinating H2O molecules. The lanthanoid contraction influences the strengths of the H-bonds, which can be observed as a red shift by 4,cm,1 in the characteristic IR band, in particular from 3595,cm,1 (3) to 3599,cm,1 (9). In good agreement with previous works, 2,9 are purely salt-like compounds without a coordinative bond between the tetrazolide anion and the Ln3+ cation. [source]