Tungsten(IV) oxide
<templatestyles src="Chembox/styles.css"/>
Template:Chembox image cellTemplate:Chembox AllOtherNamesTemplate:Chembox headerbarTemplate:Chembox IndexlistTemplate:Chembox JmolTemplate:Chembox ChEMBLTemplate:Chembox ECHATemplate:Chembox E numberTemplate:Chembox IUPHAR ligandTemplate:Chembox UNIITemplate:Chembox CompToxTemplate:Chembox headerbarTemplate:Chembox SolubilityInWaterTemplate:Chembox headerbarTemplate:Chembox headerbarTemplate:Chembox headerbarTemplate:Chembox Datapage checkTemplate:Chembox Footer| Template:Longitem | Template:Unbulleted list |
| ChEBI | Template:Unbulleted list |
| ChemSpider | Template:Unbulleted list |
| DrugBank | Template:Unbulleted list |
| EC Number | Template:Unbulleted list |
| KEGG | Template:Unbulleted list |
| Template:Longitem | Template:Unbulleted list |
| RTECS number | Template:Unbulleted list |
| Script error: No such module "collapsible list". | |
| Script error: No such module "collapsible list". | |
| Template:Longitem | WO2 |
| Molar mass | 215.839 g/mol |
| Appearance | Bronze solid |
| Density | 10.8 g/cm3 |
| Melting point | Template:Chembox CalcTemperatures |
| Template:Longitem | 5.7Template:E cm3/mol |
| Template:Longitem | Distorted rutile (monoclinic), mP12, space group P21/c, no 14 |
| Flash point | Template:Chembox CalcTemperatures |
| Template:Longitem | Tungsten disulfide |
| Template:Longitem | Chromium(IV) oxide Molybdenum(IV) oxide |
| Template:Longitem | Tungsten(III) oxide Tungsten(VI) oxide |
Template:Chembox Footer/trackingScript error: No such module "TemplatePar".Template:Short description
Tungsten(IV) oxide is the chemical compound with the formula WO2. The bronze-colored solid crystallizes in a monoclinic cell.[1] The rutile-like structure features distorted octahedral WO6 centers with alternate short W–W bonds (248 pm).[1] Each tungsten center has the d2 configuration, which gives the material a high electrical conductivity.
WO2 is prepared by reduction of WO3 with tungsten powder over the course of 40 hours at 900 °C. An intermediate in this reaction is the partially reduced, mixed valence species W18O49.
- 2 WO3 + W → 3 WO2
The molybdenum analogue MoO2 is prepared similarly. Single crystals are obtained by chemical transport technique using iodine. Iodine transports the WO2 in the form of the volatile species WO2I2.[2][3]
References
<templatestyles src="Reflist/styles.css" />
Script error: No such module "Check for unknown parameters".
Template:Tungsten compounds Script error: No such module "Navbox".