Selenium oxydichloride

Selenium oxydichloride  |

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Names
IUPAC name

Selenium oxychloride

Other names

Seleninyl chloride

Identifiers

CAS Number

* 7791-23-3 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 23049 Y

EC Number |

* 232-244-0

PubChem CID

* 24647

RTECS number |

* VS7000000

UNII |

* 1G57T5401W Y

InChI

* InChI=1S/Cl2OSe/c1-4(2)3 N

Key: LIRMPIXWGWLNND-UHFFFAOYSA-N N

* InChI=1/Cl2OSe/c1-4(2)3

Key: LIRMPIXWGWLNND-UHFFFAOYAX

SMILES

* O=[Se](Cl)Cl

Properties

Chemical formula

| 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

Molecular shape

| trigonal pyramidal
Hazards
GHS pictograms |
GHS Signal word | Warning

GHS hazard statements

| H301, H314, H331, H373, H410

GHS precautionary statements

| P260, P261, P264, P270, P271, P273, P280, P301+310, P301+330+331, P303+361+353, P304+340, P305+351+338, P310, P311, P314, P321, P330, P363, P391, P403+233, P405, P501
NFPA 704 (fire diamond)  |

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).

N verify (what is YN ?)
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

1. ↑ "Selenium compounds (as Se)". Immediately Dangerous to Life and Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH). https://www.cdc.gov/niosh/idlh/7782492.html.
2. ↑ "Selenium oxychloride" (in en). https://pubchem.ncbi.nlm.nih.gov/compound/24647#section=Safety-and-Hazards.
3. ↑ 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.

* v
* t
* e

Selenium compounds

Se(−II)|

* Ag2Se
* Al2Se3
* CaSe
* Se2−

Se(0,I)|

* Se3S5

Se(I)|

* Se2S6
* Se2Cl2
* C3H7NO2Se

Se(II)|

* SeS2

Se(IV)|

* SeCl4
* SeF4
* SeO2
* SeS2
* SeOBr2
* SeOCl2

Se(VI)|

* SeF6
* SeO3
* SeO2F2

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Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Selenium_oxydichloride&oldid=2480379"
*[CID]: Compound ID
*[H301]: Toxic if swallowed
*[H314]: Causes severe skin burns and eye damage
*[H331]: Toxic if inhaled
*[H373]: May cause damage to organs through prolonged or repeated exposure
*[H410]: Very toxic to aquatic life with long lasting effects
*[P260]: Do not breathe dust/fume/gas/mist/vapours/spray
*[P261]: Avoid breathing dust/fume/gas/mist/vapours/spray
*[P264]: Wash … thoroughly after handling
*[P270]: Do not eat, drink or smoke when using this product
*[P271]: Use only outdoors or in a well-ventilated area
*[P273]: Avoid release to the environment
*[P280]: Wear protective gloves/protective clothing/eye protection/face protection
*[P301+310]: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
*[P301+330+331]: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting
*[P303+361+353]: IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower
*[P304+340]: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
*[P305+351+338]: IF IN EYES: Rinse continuously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing
*[P310]: Immediately call a POISON CENTER or doctor/physician
*[P311]: Call a POISON CENTER or doctor/physician
*[P314]: Get Medical advice/attention if you feel unwell
*[P321]: Specific treatment (see … on this label)
*[P330]: Rinse mouth
*[P363]: Wash contaminated clothing before reuse
*[P391]: Collect spillage
*[P403+233]: Store in a well ventilated place. Keep container tightly closed
*[P405]: Store locked up
*[P501]: Dispose of contents/container to …
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