Rhenium pentachloride
200px | |
Names | |
---|---|
IUPAC name
Rhenium pentachloride
|
|
Other names
Rhenium(V) chloride, Rhenium chloride, pentachlororhenium
|
|
Identifiers | |
13596-35-5 | |
ChemSpider | 75428 |
EC Number | 237-042-6 |
Jmol 3D model | Interactive image |
PubChem | 83602 |
|
|
|
|
Properties | |
ReCl5 | |
Molar mass | 363.471 g/mol |
Appearance | red-brown |
Density | 4.9 g/cm3, solid |
Melting point | 220 °C (428 °F; 493 K) |
Boiling point | N/A |
Will react to decompose and release HCl (g) | |
Structure | |
Monoclinic, mP48; a = 0.924 nm, b = 1.154 nm, c = 1.203 nm, α = 90°, β = 109.1°, γ = 90° [1] | |
P21/c, No. 14 | |
Octahedral | |
Vapor pressure | {{{value}}} |
Related compounds | |
Other anions
|
Rhenium hexafluoride |
Related compounds
|
Trirhenium nonachloride, rhenium tetrachloride, rhenium hexachloride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
|
verify (what is ?) | |
Infobox references | |
Rhenium pentachloride is an inorganic compound of chlorine and rhenium. The compound has the formula Re2Cl10 but it is usually referred to as the pentachloride. It is a red-brown solid. It is the highest chloride of rhenium.
Structure and preparation
Rhenium pentachloride has a bioctahedral structure and can be formulated as Cl4Re(μ-Cl)2ReCl4. The Re-Re distance is 3.74 Å.[1] The motif is similar to that seen for tantalum pentachloride.
This compound was first prepared in 1933,[2] a few years after the discovery of rhenium. The preparation involves chlorination of rhenium at temperatures up to 900 °C.[3] The material can be purified by sublimation.
ReCl5 is one of the most oxidized binary chlorides of Re. With a d2 configuration, it could conceivably be further chlorinated, and indeed ReCl6 has been prepared, albeit indirectly from rhenium hexafluoride.[4] Rhenium heptafluoride is known but not the heptachloride.[5]
Uses and reactions
It degrades in air to a brown liquid.[6]
Although rhenium pentachloride has no commercial applications, it is of historic significance as one of the early catalysts for olefin metathesis.[7] Reduction gives Trirhenium nonachloride.
Oxygenation affords the Re(VII) oxychloride:[8]
- ReCl5 + 3 Cl2O → ReO3Cl + 5 Cl2
References
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Roger Lincoln, Geoffrey Wilkinson "Rhenium Pentachloride and Volatile Metal Chlorides by Direct Chlorination Using a Vertical-Tube Reactor" Inorganic Syntheses, 1980, Volume 20, Pages 41–43. doi:10.1002/9780470132517.ch11.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Stuart A. Macgregor and Klaus H. Moock "Stabilization of High Oxidation States in Transition Metals. 2.1 WCl6 Oxidizes [WF6]-, but Would PtCl6 Oxidize [PtF6]-? An Electrochemical and Computational Study of 5d Transition Metal Halides: [MF6]z versus [MCl6]z (M = Ta to Pt; z = 0, 1−, 2−)" pp 3284–3292. doi:10.1021/ic9605736
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Ring-opening polymerization of endo and exo-dicyclopentadiene and their 7,8-dihydro derivatives, Hamilton, J.G.; Ivin, K.J.; Rooney, J.J. Journal of Molecular Catalysis 1986 , 36, 115.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.