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Zeitschrift für Naturforschung B

A Journal of Chemical Sciences

12 Issues per year


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1865-7117
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Volume 66, Issue 4

Issues

Metal-Fluorocarbon Pyrolants. XII: Calciumsalze der 5-perfluoroalkylierten Tetrazole – Synthese, Charakterisierung und Leistungsbewertung als Oxidationsmittel in ternären Mischungen mit Magnesium und VitonTM/ Metal-Fluorocarbon Pyrolants. XII: Calcium Salts of 5-Perfluoroalkylated Tetrazoles – Synthesis, Characterization and Performance Evaluation as Oxidizers in Ternary Mixtures with Magnesium and VitonTM

Ernst-Christian Koch
  • Corresponding author
  • NATO Munition Safety Information Analysis Center (MSIAC), Boulevard Leopold III, 1110 Bruxelles, Belgium
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Thomas M. Klapötke
  • Fachbereich Chemie, Energetic Materials Research, Ludwig-Maximilians-Universität München, Butenandstraße 5 – 13 (D), 81377 München, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Hendrik Radies
  • Fachbereich Chemie, Energetic Materials Research, Ludwig-Maximilians-Universität München, Butenandstraße 5 – 13 (D), 81377 München, Germany
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  • De Gruyter OnlineGoogle Scholar
/ Karin Lux
  • Fachbereich Chemie, Energetic Materials Research, Ludwig-Maximilians-Universität München, Butenandstraße 5 – 13 (D), 81377 München, Germany
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  • De Gruyter OnlineGoogle Scholar
/ Arno Hahma
Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/znb-2011-0407

5H-Perfluoroalkyltetrazoles (alkyl = CF3, C2F5, C3F7) react with aqueous Ca(OH)2 to give the corresponding calcium salts 1, 2 and 3. Compounds 1 - 3, which form hydrates, were characterized by elemental analyses, differential heat flow calorimetry, multinuclear NMR, FTIR and Raman spectroscopy. A crystal structure determination was carried out on the solvate 2 ·2H2O·4CH3OH. Compounds 1 - 3 were tested as oxidizers in ternary pyrolant mixtures with magnesium and VitonTM. The burn rates, u (g s−1), of the pyrolants based on 1 show a distinct influence of the exothermicity of the primary reaction, whereas the burn rates of 2- and 3-based pyrolants do not show such behavior but display a steady increase of burn rate with increasing Mg content. At stoichiometries below 40 wt.-% Mg, the specific intensity Eλ (J g−1 sr−1) of the pyrolants based on 2 and 3 is superior to that of the standard mixture magnesium/polytetrafluoroethylene/VitonTM (MTV). This is assumed to be due to the expansion of the flame envelope by nitrogen.

Graphical Abstract

Metal-Fluorocarbon Pyrolants. XII: Calciumsalze der 5-perfluoroalkylierten Tetrazole – Synthese, Charakterisierung und Leistungsbewertung als Oxidationsmittel in ternären Mischungen mit Magnesium und VitonTM/ Metal-Fluorocarbon Pyrolants. XII: Calcium Salts of 5-Perfluoroalkylated Tetrazoles – Synthesis, Characterization and Performance Evaluation as Oxidizers in Ternary Mixtures with Magnesium and VitonTM

Metal-Fluorocarbon Pyrolants. XII: Calciumsalze der 5-perfluoroalkylierten Tetrazole – Synthese, Charakterisierung und Leistungsbewertung als Oxidationsmittel in ternären Mischungen mit Magnesium und VitonTM/ Metal-Fluorocarbon Pyrolants. XII: Calcium Salts of 5-Perfluoroalkylated Tetrazoles – Synthesis, Characterization and Performance Evaluation as Oxidizers in Ternary Mixtures with Magnesium and VitonTM

Keywords: Calcium-bis(5H-perfluoroalkyltetrazolates); Magnesium; Pyrolant; NMR; Crystal Structure

About the article

Received: 2011-01-22

Published Online: 2014-06-02

Published in Print: 2011-04-01


Citation Information: Zeitschrift für Naturforschung B, Volume 66, Issue 4, Pages 378–386, ISSN (Online) 1865-7117, ISSN (Print) 0932-0776, DOI: https://doi.org/10.1515/znb-2011-0407.

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© 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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