Hydrazinium azide

N5H5 hydrazinium azide, N2H5N3, (explosive white ciystals)... 

N6H2 Probably a cyclic dimer of N3H N7H9 hydrazinium azide monohydrazinate, N2H5N3. N2H4... 

Several salts are explosively unstable, including hydrazinium azide (explodes on rapid heating or on initiation by a detonator, even when damp), chlorate (explodes at m.p., 80°C), chlorite (also highly flammable when dry), hydrogen selenate, hydrogen sulfate (explodes when melted), nitrate, nitrite, and the highly explosive perchlorate and diperchlorate used as propellants [1,2,3]. 

Diphenylhydrazinium chloride, 3519 Hydrazinium azide, 4550 Hydrazinium chlorate, 4010 Hydrazinium chloride, 4007 Hydrazinium chlorite, 4008 Hydrazinium dinitrate, 4561 Hydrazinium diperchlorate, 4068... 

Hexaazido-2,4,6-triaza-1,3,5-triphosphorine, 4795 Hydrazinium azide, 4550 Hydrogen azide, 4441... 

Hydrazinium azide, 4545 Hydrazinium chlorate, 4004 Hydrazinium chloride, 4001 Hydrazinium chlorite, 4002 Hydrazinium dinitrate, 4556 Hydrazinium diperchlorate, 4062... 

AZIDOCARBONYL COMPOUNDS HYDRAZINIUM AZIDES METAL AZIDES NON-METAL AZIDES ORGANIC AZIDES... 

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. 

The overall equation for the decomposition of hydrazinium azide between 400 and 570 K was found to be ... 

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... 

Detonation of hydrazinium azide in an argon atmosphere under 3 MPa pressure produces ammonia, dinitrogen, and dihydrogen. 

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

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 standard heats of formation of hydrazinium azide (AH,°= 58.9 0.4 kcal mol ) and its monohydrazine adduct (AH°= 70.3 0.8 kcal mol-1) have been determined.76... 

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