Hydrazinium azotetrazolate

Fig. 12.2 Structures of hydrazinium azotetrazolate (HZT) and triaminoguanidinium azotetrazolate (TAGzT).

Fig. 2.10 Molecular structures of triaminoguanidinium azotetrazolate (TAGzT) and hydrazinium 5-aminotetrazolate (HyAt).

Fig. 3 Salts of 5,5 -azotetrazolate dianions with hydrazinium derivative cations...

Heats of formation of hydrazinium [75], ammonium 5,5 -azotetrazola-tes [79], and guanidinium [24,80], were measured as AH =+ 858, + 443, and +410kjmol respectively. In order to compare these properties with azotetrazolates that contain heterocyclic cations, imidazolium, tria-zolium, and tetrazolium derivatives were synthesized and characterized (Scheme 18) [81]. Surprisingly, while most azotetrazolates exhibit melting points in excess of 160 °C, [bis(l-butyl-3-methyl-imidazolium)] 5,5 -azo-tetrazolate (68a) was a liquid at 25 °C with a melting point of 3 C, similar to its 3,5-dinitrotetrazolate analog [46]. 

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