Selenium tetrachloride

Selenium tetrachloride, also selenious chloride, selenous chloride, or selenium(IV) chloride, is a chemical compound made of selenium and chlorine. Its chemical

Selenium tetrachloride
Selenium tetrachloride
Names
IUPAC name
Selenium tetrachloride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.036
RTECS number
  • VS7875000
  • Cl[Se](Cl)(Cl)Cl
Properties
SeCl4
Molar mass 220.771 g/mol
Appearance white to yellow crystals
Density 2.6 g/cm³, solid
Melting point sublimes at 191.4°C[1]
decomposes in water
Structure
Monoclinic, mS80
C12/c1, No. 15
Seesaw (gas phase)
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
3
0
0
Flash point non-flammable
Related compounds
Other anions
 Selenium tetrafluoride
Selenium tetrabromide
Selenium dioxide
Other cations
 Dichlorine monoxide
Sulfur tetrachloride
Tellurium tetrachloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Selenium tetrachloride, also selenious chloride, selenous chloride, or selenium(IV) chloride, is a chemical compound made of selenium and chlorine. Its chemical formula is SeCl4. It contains selenium in its +4 oxidation state.

Properties

Selenium tetrachloride is a yellow or white solid. It evaporates easily. It reacts with water to make hydrochloric acid and selenous acid. It reacts with selenium dioxide to make selenium oxychloride, a mixture of selenium dioxide and selenium tetrachloride bonded together.

Preparation

It is made by heating a mixture of selenium and chlorine. The selenium tetrachloride escapes as a gas. This can be used to purify selenium. Impure selenium can be placed in the flask, reacted with chlorine. Only selenium tetrachloride escapes. This is reduced to selenium again, making pure selenium.

Uses

It is used to purify selenium. It is used to make other selenium compounds.

References

  1. ↑ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. p. 487. ISBN 0849305942. Retrieved 2008-07-02.
  2. ↑ "323527 Selenium tetrachloride". Sigma-Aldrich. Retrieved 2008-07-02.[permanent dead link]

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