Hexachlorodisiloxane is a chemical compound composed of chlorine, silicon, and oxygen. Structurally, it is the symmetrical ether of two trichlorosilyl groups, and can be synthesized via high-temperature oxidation of silicon tetrachloride:

Hexachlorodisiloxane
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.035.504 Edit this at Wikidata
EC Number
  • 239-070-4
  • InChI=1S/Cl6OSi2/c1-8(2,3)7-9(4,5)6
    Key: QHAHOIWVGZZELU-UHFFFAOYSA-N
  • O([Si](Cl)(Cl)Cl)[Si](Cl)(Cl)Cl
Properties
Cl6OSi2
Molar mass 284.87 g·mol−1
Density 1.575 g/cm3
Melting point −33 °C (−27 °F; 240 K)
Boiling point 137 °C (279 °F; 410 K)
Hazards
GHS labelling:[1]
GHS02: FlammableGHS05: Corrosive
Danger
H223, H314, H335
Related compounds
Other anions
Hexafluorodisiloxane
Other cations
Perchloromethylether
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

At room temperature, it is a colorless liquid that hydrolyzes upon exposure to water to give silicon dioxide and hydrochloric acid: Intense heat evinces a similar decomposition:

Reaction with antimony trifluoride gives the analogous hexafluorodisiloxane.

Sources

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  • Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
  • G. Brauer [Брауэр Г.], ed. (1985). Руководство по неорганическому синтезу [Guide to Inorganic Synthesis] (in Russian). Vol. 3. Moscow: Mir. p. 392.
  • K. A. Adrianov [Адрианов К. А.] (1955). Кремнийорганические соединения [Organosilicon Compounds] (in Russian). Moscow: State scientific and technical publishing house of chemical literature. p. 521.
  • Booth, Harold Simmons; Osten, Reuben Alexander (July 1945). "The Fluorination of Chlorodisiloxane / Silicon Oxyfluoride". Journal of the American Chemical Society. 67 (7): 1092–1096. doi:10.1021/ja01223a021.

References

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  1. ^ "C&L Inventory". echa.europa.eu.