Tungsten(IV) chloride
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| Names | |
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| Other names
tungsten tetrachloride
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| Identifiers | |
| ECHA InfoCard | 100.157.353 |
| Properties | |
| Cl4W | |
| Molar mass | 325.65 g·mol−1 |
| Appearance | black solid |
| Density | 4.62 g·cm−3 |
| Melting point | 450 °C (842 °F; 723 K) |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
Tungsten(IV)-chloride is an inorganic compound with the formula WCl4. It is a diamagnetic black solid. The compound is of interest in research as one of a handful of binary .
WCl4 is usually prepared by reduction tungsten hexachloride. Many reductants have been reported, including red phosphorus, tungsten hexacarbonyl, gallium, tin, and antimony. The latter is reported to be optimal:
Like most binary metal halides, WCl4 is polymeric. It consists of a linear chains of tungsten atoms each in octahedral geometry. Of six chloride ligands attached to each W center, four are bridging ligands. The W-W separations are alternatingly bonding (2.688 Å) and nonbonding (3.787 Å).
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