What is hydrazine
Hydrazine, H2N-NH2, colorless, poisonous liquid that smokes in humid air; D. 1.011, m.p. 1.4 ° C, b.p. 113.5 ° C. At elevated temperatures, H. often decomposes explosively into ammonia and nitrogen: 3 N2H4 → 4 NH3 + N2. In the air it burns with considerable development of heat: N2H4 + O2 → N2 + 2 H.2It is infinitely miscible with water and forms a hydrazine hydrate N which can be distilled without decomposition2H4 AH2O. H. has a basic reaction. The interaction with strong acids results in two series of Hydrazinium salts the general composition [H2N-NH3]+X- and [H3N-NH3]2+ 2 X-. With regard to its nucleophilic properties, H. is far superior to ammonia. The aqueous hydrazine solution has a strongly reducing reaction and can, for. B. to deposit silver from silver salt solutions. With nitrous acid conversion to hydrazoic acid takes place: N2H4 + ENT2 → HN3 + 2 H.2O. For the production is after Raschig method Ammonia is oxidized with sodium hypochlorite in the presence of gelatin or glue. Chloramine occurs as an intermediate product: NH3 + NaOCl → NaOH + Cl-NH2; NH3 + Cl-NH2 + NaOH → H2N-NH2 + NaCl + H2O. One uses H. together with various oxidizing agents, e.g. B. nitric acid or nitrous oxide, as rocket fuel. It is the basic material for organic synthesis and is mainly used for the production of dyes, pharmaceuticals and pesticides as well as for the reduction of carbonyl compounds (Wolff-Kishner reduction).
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