Ruthenium tetrachloride
| Names | |
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| Other names
Ruthenium(IV) chloride, ruthenium(4+) tetrachloride
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.033.347 |
| EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| Cl4Ru | |
| Molar mass | 242.87 g·mol−1 |
| Related compounds | |
Related compounds
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Osmium tetrachloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Ruthenium(IV) tetrachloride is volatile inorganic compound of ruthenium and chlorine with the formula RuCl4.[1][2]
Synthesis
Synthesis of ruthenium(IV) tetrachloride is formed by the action of chlorine gas on ruthenium(III) chloride at 750 °C:
- RuCl3 + 0.5Cl2 → RuCl4
The RuCl4 is collected on a liquefied air cooled condenser and decomposes above -30 °C.[1] The reaction was determined to have the following thermodynamic properties:
- ΔH°298 = 36.6 kcal/mol (enthalpy)
- ΔS°298 = 32.8 entropy units (entropy change)
- ΔC°p = -6.6 cal/mol degree (change in heat capacity at constant pressure)
- S°298 = 99.3 entropy units
The degree signs indicate standard state.
Properties
Ruthenium(IV) tetrachloride decomposes above -30 °C:[3]
- RuCl4 → RuCl3 + 0.5Cl2
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