Rhenium(IV) chloride
Unit cell of Rhenium(IV) chloride.
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Names | |
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Other names
rhenium tetrachloride
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Identifiers | |
3D model (
JSmol ) |
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ChemSpider | |
ECHA InfoCard
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100.033.612 |
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
Cl4Re | |
Molar mass | 328.01 g·mol−1 |
Appearance | black solid |
Density | 4.5 g·cm−3 (β) |
Structure[1] | |
Primitve monoclinic
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P2/c, No. 13 | |
a = 636.2 pm, b = 627.3 pm, c = 1216.5 pm α = 90°, β = 93.15°, γ = 90°[1]
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Formula units (Z)
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4 |
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(IV) chloride is the
polymorph of ReCl4 is also known.[1]
Preparation
ReCl4 can be prepared by
rhenium(V) chloride with antimony trichloride.[2]
Tetrachloroethylene at 120 °C is also effective as a reductant:
Structure
X-ray crystallography reveals a polymeric structure. The Re–Re bonding distance is 2.728 Å. Re centers are octahedral, being surrounded by six chloride ligands. Pairs of octahedra share faces. The Re2Cl9 subunits are linked by bridging chloride ligands. The structural motif - corner-shared bioctahedra - is unusual in the binary metal halides.[1]
References
- ^ .
- ISBN 978-311022567-9.