Selenium oxydichloride
| |||
Names | |||
---|---|---|---|
IUPAC name
Selenium oxychloride
| |||
Other names
Seleninyl chloride
| |||
Identifiers | |||
3D model (JSmol)
|
|||
ChemSpider | |||
ECHA InfoCard | 100.029.313 ![]() | ||
EC Number |
| ||
PubChem CID
|
|||
RTECS number |
| ||
UNII | |||
CompTox Dashboard (EPA)
|
|||
| |||
| |||
Properties | |||
SeOCl2 | |||
Molar mass | 165.87 g/mol | ||
Appearance | colorless liquid | ||
Density | 2.43 g/cm3, liquid | ||
Melting point | 10.9 °C (51.6 °F; 284.0 K) | ||
Boiling point | 177.2 °C (351.0 °F; 450.3 K) | ||
Refractive index (nD)
|
1.651 (20 °C) | ||
Structure | |||
trigonal pyramidal | |||
Hazards | |||
GHS labelling:[2] | |||
![]() ![]() ![]() ![]() | |||
Signal word
|
Warning | ||
H301, H314, H331, H373, H410 | |||
P260, P261, P264, P270, P271, P273, P280, P301+P310, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P311, P314, P321, P330, P363, P391, P403+P233, P405, P501 | |||
NFPA 704 (fire diamond) | ![]()
3
0
1 | ||
Lethal dose or concentration (LD, LC): | |||
LDLo (lowest published)
|
2 mg/kg (rabbit, dermal)[1] | ||
Related compounds | |||
Related compounds
|
SOCl2, POCl3 | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
![]() ![]() ![]() | |||
Infobox references | |||
Selenium oxydichloride is the inorganic compound with the formula SeOCl2. It is a colorless liquid. With a high dielectric constant (55) and high specific conductance, it is an attractive solvent. Structurally, it is a close chemical relative of thionyl chloride SOCl2, being a pyramidal molecule.
Preparation and reactions[]
Selenium oxydichloride can be prepared by several methods, and a common one involves the conversion of selenium dioxide to dichloroselenious acid followed by dehydration:[3]
- SeO2 + 2 HCl → Se(OH)2Cl2
- Se(OH)2Cl2 → SeOCl2 + H2O
The original synthesis involved the redistribution reaction of selenium dioxide and selenium tetrachloride.
The compound hydrolyzes readily to form hydrogen chloride and selenium dioxide.
See also[]
- Selenium oxybromide SeOBr2
- Selenous acid H2SeO3
References[]
- ^ "Selenium compounds (as Se)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
- ^ "Selenium oxychloride". pubchem.ncbi.nlm.nih.gov. Retrieved 12 December 2021.
- ^ Smith, G. B. L.; Jackson, Julius (1950). "Selenium(IV) Oxychloride". Inorganic Syntheses. Inorganic Syntheses. 3. pp. 130–137. doi:10.1002/9780470132340.ch34. ISBN 9780470132340.
Categories:
- Selenium(IV) compounds
- Oxohalides
- Inorganic solvents
- Inorganic compound stubs