Less Sensitive Transition Metal Salts
of the 5-Nitrotetrazolate Anion

 

Thomas M. KLAPÖTKE
and Carles MIRÓ SABATÉ

Ludwig-Maximilians University of Munich,
Institut für Anorganische Chemie, Energetic Materials Research,
Butenandtstr. 5–13 (D), 81377 Munich, Germany
Laboratoire Hydrazines et Procédés, UMR 5179 CNRS-UCBL,
Université Claude Bernard Lyon 1, Batiment Berthollet,
22 Av. Gaston Berger, F-69622 Villeurbanne Cedex, France


Abstract: Transition metal (silver and copper) salts of the 5-nitrotetrazolate
(NT) anion (1 and 2) have been synthesized and characterized by analytical and
spectroscopic methods. Standard BAM tests revealed extremely high sensitivity
values for these compounds. The combination with the ethylenediamine ligand
in salts 3 and 4 decreases the sensitivities in comparison to salts 1 and 2 making
for much less hazardous handling and rendering the synthesis of NT salts more
accessible for up-scaling. Additionally, a copper ammonia adduct of the NT anion
(5) was synthesized, which shows the particularity of being able to be initiated
by a laser beam, thus, decreasing the risk of accidental initiation, which often
accompanies the use of primary explosives.

Keywords: transition metals (Ag, Cu), 5-nitrotetrazolate anion, primary
explosives, initial safety testing