Rhenium Trichloride
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| Rhenium Trichloride | ||
|---|---|---|
| Image:Rhenium Trichloride.png | ||
| General | ||
| Systematic name | Rhenium(III) chloride | |
| Other names | Rhenium trichloride | |
| Molecular formula | ReCl3 | |
| Molar mass | 292.57 g/mol | |
| Appearance | red, crystalline, nonvolatile solid | |
| CAS number | [13569-63-6] | |
| Properties | ||
| Density and phase | 4800 g/cm³ | |
| Solubility in water | hydrolyzes to form Re2O3.xH2O. | |
| In acetone In methanol In acetic acid |
Soluble Soluble Soluble |
|
| Melting point | 500 °C (decomposes) | |
| Boiling point | 500 °C | |
| Structure | ||
| Molecular shape | Trigonal planar (trimeric solid) (dimeric in solution) |
|
| Coordination geometry |
? | |
| Crystal structure | ? | |
| Dipole moment | ? D | |
| Hazards | ||
| MSDS | External MSDS | |
| Main hazards | Corrosive (C) | |
| NFPA 704 |
0
4
1
|
|
| Flash point | N/A | |
| R/S statement | R: ? S: ? |
|
| RTECS number | ? | |
| Supplementary data page | ||
| Structure and properties |
n, εr, etc. | |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
|
| Spectral data | UV, IR, NMR, MS | |
| Related compounds | ||
| Other anions | Rhenium Tribromide Rhenium Triiodide |
|
| Other cations | Rhenium Pentachloride Technetium Trichloride |
|
| Related ? | ? | |
| Related compounds | ||
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
||
Rhenium trichloride (ReCl3) is a compound of rhenium and chlorine. It is used as a starting material for peralkylated benzene-metal complexes that act as electron reservoirs.[1]
Contents |
[edit] History
[edit] Structure and Physical Properties
Rhenium trichloride is comparatively non-volatile but produces a green vapour during strong heating.[2]
[edit] Chemical Properties
Rhenium trichloride prepared from rhenium pentachloride without further treatment is chemically reactive, but if it is vacuum sublimed at 500 oC, then it becomes comparatively unreactive.[3] However, x-ray diffraction tests show no observable difference in structure between the untreated and vacuum sublimed material.
The heat of oxidation according to the equation,
ReCl3(s) + 4OH- + 2OCl- --> ReO4- + 2H2O + 5Cl-
is 190.7 ± 0.2 kcal/mole.[4]
[edit] Preparation
Rhenium trichloride is most efficiently prepared by the thermal decomposition of rhenium pentachloride in nitrogen.[5] Other methods include reacting sulphuryl chloride with rhenium powder with or without the addition of aluminum chloride,[6] or the thermal decomposition of salts of hexachlororhenic(IV) acid.[7]
Equations: ?
[edit] Uses
[edit] References
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