Tungsten(III) chloride

Tungsten(III) chloride
Identifiers

CAS Number	12371-22-1^Y
3D model (JSmol)	Interactive image
PubChem CID	5251191
CompTox Dashboard (EPA)	DTXSID50413323
InChI InChI=1S/3ClH.W/h3*1H;/q;;;+3/p-3 Key: KBSJJSOGQSGFRD-UHFFFAOYSA-K
SMILES Cl[W](Cl)Cl
Properties
Chemical formula	Cl₁₈W₆
Molar mass	1741.14 g·mol⁻¹
Appearance	yellow brown solid
Density	5.44 g·cm⁻³
Melting point	550^[1] °C (1,022 °F; 823 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tungsten(III) chloride is the inorganic compound with the formula W₆Cl₁₈. It is a cluster compound. It is a brown solid, obtainable by chlorination of tungsten(II) chloride.^[2] Featuring twelve doubly bridging chloride ligands, the cluster adopts a structure related to the corresponding chlorides of niobium and tantalum. In contrast, W₆Cl₁₂ features eight triply bridging chlorides.

A related mixed valence W(III)-W(IV) chloride is prepared by reduction of the hexachloride with bismuth:^[3]

9 WCl₆ + 8 Bi → 3 W₃Cl₁₀ + 8 BiCl₃

References

^ Eliseev, S. S.; Synthesis and physicochemical properties of tungsten trichloride. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy 1983, V19(7), P1182-5 CAPLUS
^ Yue-Qing Zheng; Ekaterina Jonas; Jürgen Nuss; Hans Georg von Schnering (1999). "The DMSO Solvated octahedro-[W₆iCl₁₂aCl₆ Cluster Molecule". Z. Anorg. Allg. Chem. 624: 1400–1404. doi:10.1002/(SICI)1521-3749(199809)624:9<1400::AID-ZAAC1400>3.0.CO;2-0.
^ Thurston, J. H.; Kolesnichenko, V.; Messerle, L. (2014). "Trinuclear Tungsten Halide Clusters". Inorganic Syntheses: Volume 36. Vol. 36. pp. 24–30. doi:10.1002/9781118744994.ch5. ISBN 978-1-118-74499-4. {{cite book}}: |journal= ignored (help)

Tungsten compounds

Tungsten(0)

Tungsten(II)

Tungsten(III)

Tungsten(IV)

Tungsten(V)

Tungsten(VI)

Organotungsten(VI) compounds	W(CH₃)₆
Polytungstate salts	H₃PW₁₂O₄₀ (NH₄)₁₀(H₂W₁₂O₄₂) Na₆[H₂W₁₂O₄₀]

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