Tungsten(III) chloride

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Tungsten(III) chloride
3D model (JSmol)
  • InChI=1S/3ClH.W/h3*1H;/q;;;+3/p-3
  • Cl[W](Cl)Cl
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).

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


  1. ^ Eliseev, S. S.; Synthesis and physicochemical properties of tungsten trichloride. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy 1983, V19(7), P1182-5 CAPLUS
  2. ^ 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.{{cite journal}}: CS1 maint: uses authors parameter (link)
  3. ^ Thurston, J. H.; Kolesnichenko, V.; Messerle, L. (2014). "Trinuclear tungsten halide clusters". Inorganic Syntheses: Volume 36. Inorg. Synth. Inorganic Syntheses. Vol. 36. pp. 24–30. doi:10.1002/9781118744994.ch5. ISBN 9781118744994.{{cite book}}: CS1 maint: uses authors parameter (link)