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Thermal Decomposition of the New Explosive 2-(5-Cyanotetrazolato)-Pentaammine Cobalt (III) Perchlorate.


SAND780466

Publication Date 1978
Personal Author Searcy, J. Q.; Shanahan, K. L.
Page Count 56
Abstract A study was made of the thermal decomposition of the new explosive 2-(5-cyanotetrazolato)-pentaamminecobalt (III) perchlorate, or CP, which is being developed for use in detonating components. Loose powder samples from a single lot were heated for various periods of time and analyzed to determine rates of decomposition. Then several techniques were used, including thermal analysis, UV-visible spectroscopy, laboratory chemical analysis, gas chromatography, and mass spectroscopy, to analyze both the gaseous and solid products of decomposition. It was found that the decomposition of CP is a heterogeneous solid-to-gas type reaction which proceeds in three stages with multiple parallel and consecutive reactions. Stage I is an endothermic stage which includes dissociation of ammonia ligands from the cobalt atom, rearrangement of the 5-cyanotetrazolato ligand to produce a nitrogen molecule and an unidentified solid species, and the oxidation-reduction reaction of cobalt (III) with ammonia to produce cobalt (II), nitrogen, and ammonium ion. Stage II, with a higher activation energy, is the oxidation of the ligands around the cobalt atom by the perchlorate ion. Stage III is the oxidation of the residual solid products from Stage I by the perchlorate ion. (ERA citation 04:001293)
Keywords
  • Chemical explosives
  • Pyrolysis
  • Thermal degradation
  • ERDA/450100
  • Cobalt/(cyanotetrazolato)-pentaammino-perchloro)
Source Agency
  • Technical Information Center Oak Ridge Tennessee
NTIS Subject Category
  • 79A - Ammunition, Explosives, & Pyrotechnics
  • 99F - Physical & Theoretical Chemistry
Corporate Authors Sandia Labs., Albuquerque, NM.; Department of Energy.
Document Type Technical Report
NTIS Issue Number 197906
Contract Number
  • EY-76-C-04-0789
Thermal Decomposition of the New Explosive 2-(5-Cyanotetrazolato)-Pentaammine Cobalt (III) Perchlorate.
Thermal Decomposition of the New Explosive 2-(5-Cyanotetrazolato)-Pentaammine Cobalt (III) Perchlorate.
SAND780466

  • Chemical explosives
  • Pyrolysis
  • Thermal degradation
  • ERDA/450100
  • Cobalt/(cyanotetrazolato)-pentaammino-perchloro)
  • Technical Information Center Oak Ridge Tennessee
  • 79A - Ammunition, Explosives, & Pyrotechnics
  • 99F - Physical & Theoretical Chemistry
  • EY-76-C-04-0789
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