Rhenium pentachloride

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Rhenium pentachloride
Names
IUPAC name
Rhenium pentachloride
Other names
Rhenium(V) chloride, Rhenium chloride, pentachlororhenium
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.033.660 Edit this at Wikidata
EC Number
  • 237-042-6
  • InChI=1S/5ClH.Re/h5*1H;/q;;;;;+5/p-5
    Key: XZQYTGKSBZGQMO-UHFFFAOYSA-I
  • InChI=1/5ClH.Re/h5*1H;/q;;;;;+5/p-5/rCl5Re/c1-6(2,3,4)5
    Key: XZQYTGKSBZGQMO-PXGBCINVAP
  • Cl[Re](Cl)(Cl)(Cl)Cl
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)
+1225.0·10−6 cm3/mol
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
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 releases HCl upon hydrolysis
GHS labelling:[2]
GHS07: Exclamation mark
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability (red): no hazard codeInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazard W: Reacts with water in an unusual or dangerous manner. E.g. sodium, sulfuric acid
1
0
W
Safety data sheet (SDS) MSDS
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).
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Rhenium pentachloride is an inorganic compound of chlorine and rhenium. The compound has the formula Re2Cl10 but it is usually referred to as rhenium pentachloride. It is a red-brown solid.

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.

tantalum pentachloride
.

This compound was first prepared in 1933,

chlorination of rhenium at temperatures up to 900 °C.[4]
The material can be purified by sublimation.

ReCl5 is one of the most oxidized binary chlorides of Re. It does not undergo further chlorination. ReCl6 has been prepared from rhenium hexafluoride.[5] Rhenium heptafluoride is known but not the heptachloride.[6]

Uses and reactions

It degrades in air to a brown liquid.[7]

Although rhenium pentachloride has no commercial applications, it is of historic significance as one of the early catalysts for olefin metathesis.[8] Reduction gives trirhenium nonachloride.

Oxygenation affords the Re(VII) oxychloride:[9]

ReCl5 + 3 Cl2O → ReO3Cl + 5 Cl2

Comproportionation of the penta- and trichloride gives rhenium tetrachloride.

References

  1. ^
    doi:10.1107/S0567740868003316
    .
  2. ^ GHS: PubChem 83602
  3. doi:10.1002/zaac.19332140304
    .
  4. doi:10.1002/9780470132517.ch11
    .
  5. PMID 23172658
    .
  6. doi:10.1021/ic9605736
  7. doi:10.1039/J19700001617
    .
  8. ^ 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.
  9. ISBN 978-0-13-039913-7
    .

External links
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