Selenium monochloride

Diselenium dichloride
Names
IUPAC name
Diselenium dichloride
Other names
  • 1,2-Dichlorodiselane
  • Dichlorodiselane
  • Dichlorodiselenide
  • Selenium chloride
  • Selenium monochloride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.022
EC Number
  • 233-037-8
UNII
  • InChI=1S/Cl2Se2/c1-3-4-2 N
    Key: VIEXQFHKRAHTQS-UHFFFAOYSA-N N
  • InChI=1/Cl2Se2/c1-3-4-2
    Key: VIEXQFHKRAHTQS-UHFFFAOYAC
  • Cl[Se][Se]Cl
Properties
Se2Cl2
Molar mass 228.84 g·mol−1
Appearance Reddish-brown oily liquid
Density 2.7741 g/cm3
Melting point −85 °C (−121 °F; 188 K)
Boiling point 127 °C (261 °F; 400 K) at 0.997 atm
insoluble, hydrolyses
Solubility in other solvents Soluble in chloroform, carbon disulfide, and acetonitrile
−94.8·10−6 cm3/mol
Hazards
GHS labelling:
Danger
H301, H311, H314, H331, H373, H410
P260, P261, P264, P270, P271, P273, P280, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P311, P312, P314, P321, P322, P330, P361, P363, P391, P403+P233, P405, P501
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

Selenium monochloride or diselenium dichloride is an inorganic compound with the formula Se2Cl2. Although a common name for the compound is selenium monochloride, reflecting its empirical formula, IUPAC does not recommend that name, instead preferring the more descriptive diselenium dichloride.

Diselenium dichloride is a reddish-brown, oily liquid that hydrolyses slowly. It exists in chemical equilibrium with SeCl2, SeCl4, chlorine, and elemental selenium. Diselenium dichloride is mainly used as a reagent for the synthesis of Se-containing compounds.

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