Hydrazines
| Alkylhydrazines (example) |
 |
| Arylhydrazines (examples) |
 |
 |
_Hydrazine_Structural_Formula_V.1.svg){kind=small} 1,2-diphenylhydrazine |
 |
In chemistry, hydrazines are a class of compounds that have a functional group in which two nitrogen atoms are linked by a covalent bond and can carry at least one or up to four alkyl or aryl substituents. Apart from the exceptions mentioned below, the alkyl or aryl hydrazines have no particular meaning.
Manufacturing
1,1-Dimethylhydrazine is produced by reducing N -nitrosodimethylamine . The reduction of benzene diazonium chloride with tin (II) chloride and hydrochloric acid gives phenylhydrazine . 2,4-Dinitrophenylhydrazine is formed when 1-chloro-2,4-dinitrobenzene is reacted with hydrazine . Tetraphenylhydrazine is formed during the oxidation of diphenylamine with potassium permanganate in acetone .
use
Phenylhydrazine and 2,4-dinitrophenylhydrazine have historical significance in chemistry. Both compounds were previously used in analytical chemistry to detect and identify compounds with carbonyl groups . Phenylhydrazine was used to study the structure of carbohydrates, because through reaction with the aldehyde group of the sugar, well-crystallizing phenylhydrazones or osazones are formed .
Individual evidence
- ^ A b c d e Siegfried Hauptmann : Organic Chemistry , 2nd revised edition, VEB Deutscher Verlag für Grundstoffindindustrie, Leipzig, 1985, pp. 522–523, ISBN 3-342-00280-8 .