Selenium (I) chloride

Structural formula
General
Surname	Selenium (I) chloride
other names	Selenium monochloride Diselene dichloride Selenium chlorine
Molecular formula	Se 2 Cl 2
Brief description	dark red liquid with a sour odor
External identifiers / databases
CAS number 10025-68-0 EC number 233-037-8 ECHA InfoCard 100.030.022 PubChem 66206 Wikidata Q3305714
properties
Molar mass	228.83 g mol −1
Physical state	liquid
density	2.77 g cm −3
Melting point	−85 ° C
boiling point	127 ° C (decomposition)
solubility	Decomposes in water soluble in chloroform, benzene, carbon tetrachloride, carbon disulfide
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 301-331-373-410 P: 260-261-301 + 310-321-405-501
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Selenium (I) chloride is an inorganic chemical compound of selenium from the group of chlorides .

Extraction and presentation

Selenium (I) chloride can be obtained by reacting a solution of selenium dioxide in hydrochloric acid with selenium.

${\displaystyle {\ce {3Se + SeO2 + 4HCl -> 2Se2Cl2 + 2H2O}}}$

It can also be represented by the reaction of selenium and sulfur trioxide with hydrogen chloride .

${\displaystyle {\ce {2Se + 2SO3 + 3HCl -> Se2Cl2 + H2SO3 + SO2(OH)Cl}}}$

properties

Selenium (I) chloride is a dark red, slightly brownish, oily and moisture-sensitive liquid that is soluble in chloroform , benzene , carbon tetrachloride and carbon disulfide . It smells similar to disulfur dichloride and slowly hydrolyzes with water to form selenic acid , hydrochloric acid and selenium. Solid selenium (I) chloride has a monoclinic crystal structure with the space group P 2 ₁ / n (space group no. 14, position 2) .

See also

• Selenium tetrachloride
• Selenium (I) bromide

Individual evidence

1. ↑ ^{a b c d e f g h i j} Data sheet Selenium (I) chloride, 99% from AlfaAesar, accessed on November 22, 2013 ( PDF )(JavaScript required) .
2. ↑ ^{a b} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 416.
3. ^ Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 720 ( limited preview in Google Book Search).