Chemistry:Pyrazolidine

Pyrazolidine

Structural formula of pyrazolidine Ball-and-stick model of the pyrazolidine molecule
Names
Preferred IUPAC name Pyrazolidine
Other names 1,2-Diazolidine
Identifiers
CAS Number	504-70-1 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:33138 N
ChemSpider	71365 N
PubChem CID	79033
UNII	Y0MA3161MR Y
InChI InChI=1S/C3H8N2/c1-2-4-5-3-1/h4-5H,1-3H2 N Key: USPWKWBDZOARPV-UHFFFAOYSA-N N InChI=1/C3H8N2/c1-2-4-5-3-1/h4-5H,1-3H2 Key: USPWKWBDZOARPV-UHFFFAOYAM
SMILES C1CNNC1
Properties
Chemical formula	C3H8N2
Molar mass	72.10902
Density	1.00 g/cm3 (20 °C)
Melting point	10 to 12 °C (50 to 54 °F; 283 to 285 K)
Boiling point	138 °C (280 °F; 411 K)
Refractive index (nD)	1.477
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Tracking categories (test):

• PairSizeSet

Pyrazolidine is a heterocyclic compound. It is a liquid that is stable in air, but it is hygroscopic.

Preparation

Pyrazolidine can be produced by cyclization of 1,3-dichloropropane or 1,3-dibromopropane with hydrazine:

$\mathrm{C}\mathrm{l}\mathrm{-}\mathrm{(}\mathrm{C}{\mathrm{H}}_{\mathrm{2}}{\mathrm{)}}_{\mathrm{3}}\mathrm{-}\mathrm{C}\mathrm{l}\mathrm{+}{\mathrm{N}}_{\mathrm{2}}{\mathrm{H}}_{\mathrm{4}}\stackrel{\mathrm{\Delta }T}{\to }{\mathrm{C}}_{\mathrm{3}}{\mathrm{H}}_{\mathrm{8}}{\mathrm{N}}_{\mathrm{2}}\mathrm{+}\mathrm{2}\mathrm{H}\mathrm{C}\mathrm{l}$

$\mathrm{B}\mathrm{r}\mathrm{-}\mathrm{(}\mathrm{C}{\mathrm{H}}_{\mathrm{2}}{\mathrm{)}}_{\mathrm{3}}\mathrm{-}\mathrm{B}\mathrm{r}\mathrm{+}{\mathrm{N}}_{\mathrm{2}}{\mathrm{H}}_{\mathrm{4}}\stackrel{\mathrm{\Delta }T}{\to }{\mathrm{C}}_{\mathrm{3}}{\mathrm{H}}_{\mathrm{8}}{\mathrm{N}}_{\mathrm{2}}\mathrm{+}\mathrm{2}\mathrm{H}\mathrm{B}\mathrm{r}$

See also

• Pyrazole
• Pyrazoline