Hydrazinium azide hydrazinate

Hydrazinium azide hydrazinate can be synthesized by heating a mixture of hydrazinium azide and an equimolar amount of hydrazine to 333 K for several days. 

The detonation of hydrazinium azide hydrazinate under pressure produces ammonia, dinitrogen, and dihydrogen. 

Hammerl, A., Klapotke, T.M., and Piotrowski, H. (2001) Synthesis and characterization of hydrazinium azide hydrazinate. Propellants Explosives Pyrotechnics, 26, 161-164. 

Hydrazine metal malonates and succinates, 180 Hydrazinemetal nitrates, 181 Hydrazinium azides, 181 Hydrazinium salts, 181 Hydrazones, 182... 

Ionic liquids should also be very suitable for use as monopropellants, but the salts used must contain either the oxidizer and fuel combined, or salt mixtures which contain both oxidizing and reducing salts. Since these mixtures are homogeneous systems which contain both the oxidizer and fuel, they can be labeled as monopropellants, just as hydrazine is. Particularly interesting are salt mixtures which are less toxic and have a lower vapor pressure than hydrazine. Such mixtures are also known as green propellants . Suitable anions are the nitrate or dinitramide ions [58], A combination which has already been studied intensively as an oxidizer is the HAN, hydroxylammonium nitrate system. ADN, ammonium nitrate (AN) and hydrazinium nitrate (HN) have also been investigated. As fuels, hydroxylammonium azide (HAA), ammonium azide (AA) or hydrazinium azide (HA) may be appropriate. As a rule, these salt mixtures are not used as pure substances on safety grounds, but with 20 or 40% water added they then decompose catalytically in an exothermic reaction. Table 9.7 shows the dependence of the calculated specific impulses on the water content for such salt mixtures. 

Gaseous 2-tetrazene decomposes only slowly at low pressures to form hydrazinium azide. In solution, 2-tetrazene decomposes above 253 K. It can disproportionate to form dinitrogen and hydrazine or to ammonium azide. 

The first step in the decomposition of hquid hydrazinium azide is the dissociation to hydrazine and HN3. 

Hydrazinium azide is prepared by the reaction of hydrazine with hydrazoic acid. To avoid the handling of the hazardous HN3, which is generally synthesized by the reaction of sodium azide with an acid, several procedures have been developed for this reaction. Hydrazoic acid has been generated by the reaction of ion-exchange resins, mineral acids, or stearic acid. It was then either passed through a solution of hydrazine in an inert gas stream or a solution of hydrazoic acid was added to a solution of hydrazine. Especially pure hydrazinium azide can be obtained by the reaction of anhydrous solutions of HN3 in diethyl ether with a suspension of anhydrous hydrazine in... 

Both hydrazinium azide and its hydrazinate have been tested in explosive mixtures and as gas generators, but so far they... 

In addition, interesting polyazido diamine and hydrazine derivatives were prepared, either by Hofmann elimination of the corresponding diammonium and hydrazinium azide (again smooth conditions), or by reaction of sodium azide with the corresponding chlo-roethyl diamine or hydrazine (Scheme 13.8). ... 

Inorganic derivatives of hydrazine Hydrazine salts and metal hydrazine complexes of perchlorate, nitrate, azide, hydrazinium nitroformate, or azide Hydrazinium azide... 

Interestingly, similar rearranged salts, like hydrazinium azide hydrazi-nate [N2H5+]-[N3 ]-N2H4, have been reported by heating equimolar amounts of hydrazinium azide and hydrazine. This mixture is heated to 50 °C in an evacuated vessel for 2 days and the product obtained is recrystallized from methanol [7]. 

The DTA data of hydrazinium azide shows an endotherm due to melting at 75 °C and again an endothermic peak at 173 °C corresponding to its volatilization (Figure 2.4a). N2H5N3 is reported to decompose explosively into hydrazine, ammonia, and nitrogen gas on rapid heating ... 

Hydrazinium azide, utilized as a gun propellant, is unfortunately hygroscopic and volatile and, therefore, not very useful. Instead, the hydrazine adduct of hydrazinium azide, (N2H5 ) (N3 ) N2H4, has been more... 

Hydrazine complexes of alkaline earth azides, Mg(N3)2(N2H4)2 and Ca(N3)2-1.5N2H4, are prepared by the solid-state reaction of the corresponding alkaline earth metal oxides with hydrazinium azide (1 2) at 120 °C for 5h. Barium forms non-solvated azide [Ba(N3)2] ... 

FERROUS CHLORIDE TETRA-HYDRATE (7758-94-3) FeCl Contact with ethylene oxide may initiate polymerization. Reacts violently with reducing agents, including hydrides, nitrides, and sulfides acrolein, alcohols, chlorine trifluoride, ethers, fluorine, hydrazine, hydrazinium perchlorate, hydrogen peroxide, finely divided aluminum or magnesium, peroxyfuroic acid, sodium acetylide. Sensitizes most organic azides which are unstable shock and heat-sensitive explosives. Forms explosive materials with l,3-di(5-tetrazoyl)triazene, potassium,sodium. Incompatible with glycidol, isopropyl chlorocarbonate, nitrosyl perchlorate, sodium borohydride. Aqueous solution attacks metals. 

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