Editing Hydrazine (section)

==Etymology and history==
The name "hydrazine" was coined by [[Emil Fischer]] in 1875; he was trying to produce organic compounds that consisted of mono-substituted hydrazine.<ref>{{Cite journal |vauthors=Fischer E |date=1875 |title=Über aromatische Hydrazinverbindungen |trans-title=On aromatic hydrazine compounds |url=https://gallica.bnf.fr/ark:/12148/bpt6k90680z/f596.image.langEN |journal=[[Berichte der Deutschen Chemischen Gesellschaft|Ber. Dtsch. Chem. Ges.]] |volume=8 |pages=589–594 |doi=10.1002/cber.187500801178}}</ref> By 1887, [[Theodor Curtius]] had produced hydrazine sulfate by treating organic diazides with dilute sulfuric acid; however, he was unable to obtain pure hydrazine, despite repeated efforts.<ref>{{Cite journal |vauthors=Curtius T |date=1887 |title=Über das Diamid (Hydrazin) |trans-title=On diamide (hydrazine) |url=https://gallica.bnf.fr/ark:/12148/bpt6k907102/f818.image.langEN |journal=[[Berichte der Deutschen Chemischen Gesellschaft|Ber. Dtsch. Chem. Ges.]] |volume=20 |pages=1632–1634 |doi=10.1002/cber.188702001368}}</ref><ref>{{Cite book |title=Journal für praktische Chemie |vauthors=Curtius T, Jay R |publisher=Verlag von Johann Ambrosius Barth |year=1889 |veditors=Erdmann OL |volume=147 |chapter=Diazo- und Azoverbindungen der Fettreihe. IV. Abhandlung. über das Hydrazin |trans-chapter=Diazo- and azo- compounds of alkanes. Fourth treatise. On hydrazine |chapter-url=https://books.google.com/books?id=GHYMAAAAYAAJ&pg=PA27}} On p. 129, Curtius admits: "{{lang|de|''Das freie Diamid'' NH<sub>2</sub>-NH<sub>2</sub> ''ist noch nicht analysiert worden''.|italic=unset}}" [Free hydrazine has not been analyzed yet.]</ref><ref>{{Cite book |title=Journal für praktische Chemie |vauthors=Curtius T, Schulz H |year=1890 |volume=150 |pages=521–549 |chapter=''Über Hydrazinehydrat und die Halogenverbindungen des Diammoniums'' |trans-chapter=On hydrazine hydrate and the halogen compounds of diammonium |chapter-url=https://gallica.bnf.fr/ark:/12148/bpt6k90790j/f527.image.langEN?lang=EN}}</ref> Pure anhydrous hydrazine was first prepared by the Dutch chemist [[Cornelis Adriaan Lobry van Troostenburg de Bruyn|Lobry de Bruyn]] in 1895.<ref>{{Cite journal |vauthors=Lobry de Bruyn CA |year=1894 |title=Sur l'hydrazine (diamide) libre |trans-title=On free hydrazine (diamide) |journal=[[Recueil des Travaux Chimiques des Pays-Bas|Recl. Trav. Chim. Pays-Bas]] |volume=13 |issue=8 |pages=433–440 |doi=10.1002/recl.18940130816}}</ref><ref>{{Cite journal |vauthors=Lobry de Bruyn CA |date=1895 |title=Sur l'hydrate d'hydrazine |trans-title=On the hydrate of hydrazine |journal=[[Recueil des Travaux Chimiques des Pays-Bas|Recl. Trav. Chim. Pays-Bas]] |volume=14 |issue=3 |pages=85–88 |doi=10.1002/recl.18950140302}}</ref><ref>{{Cite journal |vauthors=Lobry de Bruyn CA |date=1896 |title=L'hydrazine libre I |trans-title=Free hydrazine, Part 1 |journal=[[Recueil des Travaux Chimiques des Pays-Bas|Recl. Trav. Chim. Pays-Bas]] |language=en |volume=15 |issue=6 |pages=174–184 |doi=10.1002/recl.18960150606}}</ref>

The nomenclature is a bi-valent form, with prefix ''hydr-'' used to indicate the presence of [[hydrogen]] atoms and suffix beginning with ''-az-'', from ''azote'', the French word for [[nitrogen]].