from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun inorganic chemistry The
divalent radicaland functional group-NHNH- derived from hydrazine, and N-substituted derivatives.
Sorry, no etymologies found.
When reduced (in acid solution) they yield amines; distillation with reduced iron gives azo compounds, and warming with ammonium sulphide gives hydrazo compounds.
Those not containing a nitro group may be prepared by the oxidation of the corresponding mixed hydrazo compounds with mercuric oxide.
It melts at 112-114° C. and is easily reduced to the corresponding hydrazo compound.
They may be prepared by the reduction of nitro compounds in alkaline solution (using zinc dust and alkali, or a solution of an alkaline stannite as a reducing agent); by oxidation of hydrazo compounds; or by the coupling of a diazotized amine and any compound of a phenolic or aminic type, provided that there is a free para position in the amine or phenol.
By oxidizing agents they are converted into azoxy compounds, and by reducing agents into hydrazo compounds or amines.