3D model (JSmol)
|Molar mass||220.771 g/mol|
|Appearance||white to yellow crystals|
|Density||2.6 g/cm³, solid|
|Melting point||sublimes at 191.4°C|
|decomposes in water|
|C12/c1, No. 15|
|Seesaw (gas phase)|
|EU classification||Toxic (T), Dangerous for the environment (N)|
|R-phrases||R23/25, R33, R50/53|
|S-phrases||S20/21, S28, S45, S60, S61|
|Other anions||Selenium tetrafluoride|
|Other cations||Dichlorine monoxide|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Selenium tetrachloride, also selenious chloride, selenous chloride, or selenium(IV) chloride, is a chemical compound. Its chemical formula is SeCl4. It contains selenium in its +4 oxidation state. It also contains chloride ions.
Properties[change | change source]
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[change | change source]
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[change | change source]
It is used to purify selenium. It is used to make other selenium compounds.