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Rhenium pentachloride

In this article, we will explore the fascinating world of Rhenium pentachloride, a topic that has captured the attention of millions of people around the world. From its origins to its influence on today's society, Rhenium pentachloride has been the subject of in-depth studies and analysis. Throughout history, Rhenium pentachloride has played a crucial role in various fields, from culture to politics, science and technology. Through this article, we will try to shed light on the mysteries and complexities surrounding Rhenium pentachloride, offering a comprehensive overview that allows our readers to better understand its importance and impact on the modern world.

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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
  • monomer: Cl(Cl)(Cl)(Cl)Cl
  • dimer: Cl1(Cl)(Cl)(Cl)(1)(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 pentafluoride
Other cations
 Osmium pentachloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
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Rhenium pentachloride is an inorganic compound with the formula Re2Cl10. This red-brown solid[3] is paramagnetic.[4]

Structure and preparation

Rhenium pentachloride has a bioctahedral structure and can be described as Cl4Re(μ-Cl)2ReCl4. The (μ-Cl)2 part of this formula indicates that two chloride ligands are bridging ligands, i.e. they connect to two Re atoms. 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,[5] 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. It does not undergo further chlorination. ReCl6 has been prepared from rhenium hexafluoride.[6] Rhenium heptafluoride is known but not the heptachloride.[7]

Uses and reactions

It degrades in air to a brown liquid.[8]

Although rhenium pentachloride has no commercial applications, it is of historic significance as one of the early catalysts for olefin metathesis.[9] Reduction gives trirhenium nonachloride.

Oxygenation affords the Re(VII) oxychloride:[10]

ReCl5 + 3 Cl2O → ReO3Cl + 5 Cl2

Comproportionation of the penta- and trichloride gives rhenium tetrachloride.

References

  1. ^ a b Mucker, K. F.; Smith, G. S.; Johnson, Q. (1968). "The crystal structure of ReCl5" (PDF). Acta Crystallographica Section B. 24 (6): 874. Bibcode:1968AcCrB..24..874M. doi:10.1107/S0567740868003316.
  2. ^ GHS: PubChem 83602
  3. ^ a b 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.
  4. ^ Shaik, Sason; Hoffmann, Roald; Fisel, C. Richard; Summerville, Richard H. (1980). "Bridged and Unbridged M2L10 Complexes". Journal of the American Chemical Society. 102 (14): 4555–4572. doi:10.1021/ja00534a001.
  5. ^ Geilmann, Wilhelm; Wrigge, Friedrich W.; Biltz, Wilhelm. (1933). "Rheniumpentachlorid". Z. Anorg. Allg. Chem. (in German). 214 (3): 244. doi:10.1002/zaac.19332140304.
  6. ^ Tamadon, Farhad; Seppelt, Konrad (2013). "The Elusive Halides VCl5, MoCl6, and ReCl6". Angew. Chem. Int. Ed. 52 (2): 767–769. doi:10.1002/anie.201207552. PMID 23172658.
  7. ^ MacGregor, Stuart A.; Moock, Klaus H. (1998). "Stabilization of High Oxidation States in Transition Metals. 2. 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−)". Inorganic Chemistry. 37 (13): 3284–3292. doi:10.1021/ic9605736.
  8. ^ Edwards, D. A.; Ward, R. T. (1970). "Some reactions of rhenium(V) chloride". Journal of the Chemical Society A: 1617. doi:10.1039/J19700001617.
  9. ^ 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.
  10. ^ Housecroft, C. E.; Sharpe, A. G. (2004). Inorganic Chemistry (2nd ed.). Prentice Hall. ISBN 978-0-13-039913-7.
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