Pyrazole is a five-membered heterocycle , an analog of pyrrole , in which the —CH— group in position 2 is replaced by a nitrogen atom ; isomeric to imidazole .
| Pyrazole | |
|---|---|
 | |
| Are common | |
| Traditional names | 1,2-diazole |
| Chem. formula | C 3 H 4 N 2 |
| Physical properties | |
| Molar mass | 68.07 g / mol |
| Thermal properties | |
| T. melt. | 66—70 ° C |
| T. bale. | 186—188 ° C |
| Classification | |
| Reg. CAS number | 288-13-1 |
| PubChem | |
| Reg. EINECS number | |
| Smiles | |
| Inchi | |
| RTECS | |
| Chebi | |
| ChemSpider | |
Properties
In its chemical properties it is similar to aromatic hydrocarbons (it is easily nitrated , sulfonated ), it has acid - base properties.
Getting
Application
Dyes and drugs based on pyrazole derivatives, and in particular pyrazolone, have been used.
