Allophanyl azide

Thiele UhlfelderfRef 2) obtained a white ppt of the explosive silver salt by treating an alcoholic soln of allophanyl-azide with an aq soln of Ag nitrate Refs l)Beil 3, 129 2)J-Thiele E. 

Alkali metal azides, 1 79 2 139 Alkali metal cyanates, 2 86 Alkali metal pyrosulfites, 2 162 Alkali metal sulfites, 2 162 Alkaline earth azides, 1 79 Allanite, extraction of, 2 44 Allophanyl azide, formation of, from allophanyl hydrazide, 5 51 Allophanyl hydrazide (1-amino-biuret), 5 48 hydrazones of, 5 51 from methyl and ethyl alloph-anates, 5 50 salts of, 5 51... 

NH2CONHCON2H3 Allophanyl hydrazide, 6 48, 50 hydra-zones, 5 51 salts, 5 51 NH2CONHCON3 Allophanyl azide, 5 51... 

Allophanyl hydrazide is a white, crystalline, nonhygro-scopic compound which melts at 166° with decomposition. It is soluble in water, methanol, and ethanol (at their boiling points) to the extents of 14, 3, and 1.4 g./lOO ml. of solvent, respectively. It is a weak base, KB = 10-n. Melting points and formulas of typical salts are tabulated below. The compound is thermally unstable when heated at 110° for an extended period of time. As a typical hydrazine derivative, allophanyl hydrazide forms allophanyl hydrazones with carbonyl compounds. Among these, the water-insoluble benzaldehyde derivative (m.p. 208 to 209°) is easily prepared. Allophanyl hydrazide can also be treated with nitrous acid to give the water-insoluble azide, NH2CONHCON3, melting with decomposition at 193°. 

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