Selenium oxydichloride
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| Names | |||
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IUPAC name
Selenium oxychloride
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| Other names
Seleninyl chloride
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| Identifiers | |||
7791-23-3 
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| 3D model (Jmol) | Interactive image | ||
| ChemSpider |
23049 
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| ECHA InfoCard | 100.029.313 | ||
| EC Number | 232-244-0 | ||
| PubChem | 24647 | ||
| RTECS number | VS7000000 | ||
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| 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) | ||
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Refractive index (nD)
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1.651 (20 °C) | ||
| Structure | |||
| trigonal pyramidal | |||
| Hazards | |||
| R-phrases | 14-23/25-33-35-50/53 | ||
| S-phrases | 26-36/37/39-45-60-61 | ||
| NFPA 704 | |||
| Lethal dose or concentration (LD, LC): | |||
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LDLo (lowest published)
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2 mg/kg (rabbit, dermal) | ||
| Related compounds | |||
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Related compounds
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SOCl2, POCl3 | ||
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is ?) |
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| 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.
Selenium oxydichloride can be prepared by several methods, and a popular one involves the conversion of selenium dioxide to dichloroselenious acid followed by dehydration:
The original synthesis involved the redistribution reaction of selenium dioxide and selenium tetrachloride.
The compound hydrolyzes readily.
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