3,4-Dichloro-1,2,5-thiadiazole

3,4-Dichloro-1,2,5-thiadiazole
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.024.757
EC Number
  • 227-232-7
UNII
  • InChI=1S/C2Cl2N2S/c3-1-2(4)6-7-5-1
    Key: YNZQOVYRCBAMEU-UHFFFAOYSA-N
  • C1(=NSN=C1Cl)Cl
Properties
C2Cl2N2S
Molar mass 155.00 g·mol−1
Density 1.648 g/cm3
Boiling point 158 °C (316 °F; 431 K)
Hazards
GHS labelling:
Danger
H301, H315, H319, H335, H412
P261, P264, P264+P265, P270, P271, P273, P280, P301+P316, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

3,4-Dichloro-1,2,5-thiadiazole is the heterocycle with the formula Cl2C2N2S. It is a colorless liquid. The compound is produced by treating cyanogen with disulfur dichloride. The compound can also be prepared from aminoacetonitrile.

It is a planar molecule consisting of a thiadiazole core with two chlorine atoms as substituents. The chloride groups are displaced readily by ammonia to give the diamine:

Cl2C2N2S + 4 NH3 → (H2N)2C2N2S + 2 NH4Cl
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