See also:

• HYDRAZINE (DIAMIDOGEN), N2H4

HYDRAZINE (DIAMIDOGEN), N2H4  or H2 N•See also:

• NH2

NH2, a See also:

• COMPOUND
• COMPOUND (from Lat. componere, to combine or put together)

compound of See also:

• HYDROGEN [symbol H, atomic weight x-oo8 (0=16)]

hydrogen and See also:

• NITROGEN [symbol N., atomic weight 14.01, 0=16]

nitrogen, first prepared by Th . See also:

• CURTIUS, ERNST (1814-1896)
• CURTIUS, MARCUS

Curtius in 1887 from diazo-acetic ester, N2CH•CO2C2H5 . This ester, which is obtained by the See also:

• ACTION

action of See also:

• POTASSIUM [symbol K (from kalium), atomic weight 39.114 0=16)]

potassium nitrate on the hydrochloride of amidoacetic ester, yields on See also:

• HYDROLYSIS (Gr. 6Swp, water, Anew, to loosen)

hydrolysis with hot concentrated potassium hydroxide an See also:

• ACID (from the Lat. root ac-, sharp; acere, to be sour)

acid, which Curtius regarded as CIH3N6(See also:

• CO2H

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 (from Lat. solvere, to loosen, dissolve)

solution with warm dilute sulphuric acid, See also:

• HYDRAZINE (DIAMIDOGEN), N2H4

hydrazine sulphate and oxalic acid are obtained . C . A . Lobry de Bruyn (Ber., 1895, 28, p . 3085) prepared See also:

• FREE

free hydrazine by dissolving its hydrochloride in methyl See also:

• ALCOHOL

alcohol and adding See also:

• SODIUM [symbol Na, from Lat. natrium; atomic weight 23.00 (0=16)]

sodium methylate; sodium chloride was precipitated and the residual liquid afterwards fractionated under reduced pressure .