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Rhodium(III) chloride
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Rhodium(III) chloride refers to inorganic compounds with the formula RhCl3(H2O)n, where n varies from 0 to 3. These are diamagnetic solids featuring octahedral Rh(III) centres. Depending on the value of n, the material is either a dense brown solid or a soluble reddish salt. The soluble trihydrated (n = 3) salt is widely used to prepare compounds used in homogeneous catalysis, notably for the industrial production of acetic acid and hydroformylation.[2]
Quick Facts Names, Identifiers ...
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![]() Trihydrate | |
Names | |
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Other names
Rhodium trichloride | |
Identifiers | |
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3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.030.138 ![]() |
EC Number |
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PubChem CID |
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RTECS number |
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Properties | |
RhCl3 | |
Molar mass | 209.26 g/mol |
Appearance | dark red solid deliquescent |
Density | 5.38 g/cm3, solid |
Melting point | ca. 450 °C (842 °F; 723 K) |
Boiling point | 717 °C (1,323 °F; 990 K) |
insoluble | |
Solubility | soluble in hydroxide and cyanide solutions, also soluble in aqua regia |
Acidity (pKa) | acidic in solution |
−7.5·10−6 cm3/mol | |
Structure | |
Monoclinic, mS16 | |
C12/m1, No. 12 | |
octahedral | |
Thermochemistry | |
Std enthalpy of formation (ΔfH⦵298) |
−234 kJ/mol |
Hazards | |
Flash point | Nonflammable |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
>500 mg/kg (rat, oral) 1302 mg/kg (rat, oral)[1] |
Safety data sheet (SDS) | ICSC 0746 |
Related compounds | |
Other anions |
Rhodium(III) fluoride Rhodium(III) bromide Rhodium(III) iodide |
Other cations |
Cobalt(II) chloride Iridium(III) chloride |
Related compounds |
Ruthenium(III) chloride Palladium(II) chloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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