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Osmium(V) chloride

Names
Other names pentachloroosmium, osmium pentachloride
Identifiers
CAS Number	71328-74-0
3D model (JSmol)	Interactive image
ChemSpider	4423016
PubChem CID	5257384
InChI InChI=1S/5ClH.Os/h5*1H;/q;;;;;+5/p-5Key: UVOYHLXSTOWTCX-UHFFFAOYSA-I
SMILES Cl(Cl)(Cl)(Cl)Cl
Properties
Chemical formula	Cl5Os
Molar mass	367.48 g·mol
Appearance	black solid
Density	4.09
Melting point	160 °C (320 °F; 433 K)
Solubility in water	soluble
Structure
Space group	P21/c
Lattice constant	a = 9.17 Å, b = 11.5 Å, c = 11.97 Åα = 90°, β = 109°°, γ = 90°.
Lattice volume (V)	1194 Å
Formula units (Z)	8
Related compounds
Related compounds	Osmium pentafluoride; Rhenium pentachloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Osmium(V) chloride is an inorganic chemical compound of osmium metal and chlorine with the chemical formula OsCl₅.

Potential synthesis

Osmium(V) chloride can be obtained in small amounts by reacting osmium hexafluoride with excess boron trichloride:

2OsF₆ + 4BCl₃ → 2OsCl₅ + 4BF₃ + Cl₂

It can also be obtained by the action of sulfur dichloride on osmium tetroxide:

2OsO₄ + 8SCl₂ + 5Cl₂ → 2OsCl₅ + 8SOCl₂

Physical properties

Osmium(V) chloride forms a black dimeric solid, isomorphic with rhenium(V) chloride. OsCl₅ is sparingly soluble in non-polar solvents. It is soluble in POCl₃ to form a red-brown solution, which can crystallize OsCl₅·POCl₃.

References

1. "Crystallography Open Database". qiserver.ugr.es. Retrieved 31 March 2023.
2. ^ Burns, Robert C.; O'Donnell, Thomas A. (1 November 1979). "Preparation and characterization of osmium pentachloride, a new binary chloride of osmium". Inorganic Chemistry. 18 (11): 3081–3086. doi:10.1021/ic50201a027. ISSN 0020-1669. Retrieved 31 March 2023.
3. Holleman, A. F.; Wiberg, Egon; Wiberg, Nils (2001). Inorganic Chemistry. Academic Press. p. 1461. ISBN 978-0-12-352651-9. Retrieved 31 March 2023.
4. Dehnicke, Kurt; Lößberg, Rainer (1 December 1980). "Eine neue Synthese und das IR-Spektrum von Osmiumpentachlorid / A New Synthesis and the IR Spectrum of Osmiumpentachloride". Zeitschrift für Naturforschung B (in German). 35 (12): 1525–1528. doi:10.1515/znb-1980-1207.
5. Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 2985. ISBN 978-0-412-30120-9. Retrieved 31 March 2023.
6. Dehnicke, Kurt; Lößberg, Rainer (1980-12-01). "Eine neue Synthese und das IR-Spektrum von Osmiumpentachlorid / A New Synthesis and the IR Spectrum of Osmiumpentachloride". Zeitschrift für Naturforschung B. 35 (12). Walter de Gruyter GmbH: 1525–1528. doi:10.1515/znb-1980-1207. ISSN 1865-7117.

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