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HYDRAZINE (DIAMIDOGEN), N2H4

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Originally appearing in Volume V14, Page 110 of the 1911 Encyclopedia Britannica.
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HYDRAZINE (DIAMIDOGEN), N2H4 or H2 N•See also:NH2, a See also:compound of See also:hydrogen and See also:nitrogen, first prepared by Th. See also:Curtius in 1887 from diazo-acetic ester, N2CH•CO2C2H5. This ester, which is obtained by the See also:action of See also:potassium nitrate on the hydrochloride of amidoacetic ester, yields on See also:hydrolysis with hot concentrated potassium hydroxide an See also:acid, which Curtius regarded as CIH3N6(See also:CO2H)a, but which A. Hantzsch and 0. Silberrad (Ber., 190o, 33, p. 58) showed to be C2H2N4(CO2H)2, bisdiazoacetic acid. On digestion of its warm aqueous See also:solution with warm dilute sulphuric acid, hydrazine sulphate and oxalic acid are obtained. C. A. Lobry de Bruyn (Ber., 1895, 28, p. 3085) prepared See also:free hydrazine by dissolving its hydrochloride in methyl See also:alcohol and adding See also:sodium methylate; sodium chloride was precipitated and the residual liquid afterwards fractionated under reduced pressure.

End of Article: HYDRAZINE (DIAMIDOGEN), N2H4

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