| Revision as of 20:13, 29 June 2011 editAlexNB (talk | contribs)357 edits corrected the insane mp and bp values (see, for example, MSDS data at http://www.espimetals.com/index.php/msds/223-niobium-fluoride)← Previous edit | Revision as of 20:24, 29 June 2011 edit undoCheMoBot (talk | contribs)Bots141,565 edits Updating {{chembox}} (changes to watched fields - updated 'UNII_Ref', 'ChemSpiderID_Ref', 'StdInChI_Ref', 'StdInChIKey_Ref', 'ChEMBL_Ref', 'KEGG_Ref') per Chem/Drugbox validation (report [[WikipeNext edit → | ||
| Line 1: | Line 1: | ||
| {{chembox | {{chembox | ||
| | Watchedfields = changed | |||
| | verifiedrevid = 382097470 | | verifiedrevid = 382097470 | ||
| | Name = Niobium(V) fluoride | | Name = Niobium(V) fluoride | ||
Revision as of 20:24, 29 June 2011
| Names | |
|---|---|
| IUPAC names
Niobium(V) fluoride Niobium pentafluoride | |
| Identifiers | |
| CAS Number | |
| ECHA InfoCard | 100.029.109 
|
| PubChem CID | |
| CompTox Dashboard (EPA) | |
| Properties | |
| Chemical formula | NbF5 |
| Molar mass | 187.898 g/mol |
| Appearance | colorless monoclinic crystals hygroscopic |
| Density | 3.293 g/cm |
| Melting point | 72-73 °C |
| Boiling point | 236 °C |
| Solubility in water | reacts |
| Solubility | slightly soluble in chloroform, carbon disulfide, sulfuric acid |
| Hazards | |
| Flash point | Non-flammable |
| Related compounds | |
| Other anions | Niobium(V) chloride Niobium(V) bromide Niobium(V) iodide |
| Other cations | Vanadium(V) fluoride Tantalum(V) fluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
 Y verify (what is ?)
Infobox references
| |
Niobium(V) fluoride, also known as niobium pentafluoride, is a colorless crystalline solid often used as a starting material in niobium chemistry.
Preparation
Niobium pentafluoride is obtained as an intermediate during the recovery of niobium metal from its ores. It also can be prepared by direct fluorination of niobium metal at 250 to 300°C, either by fluorine gas or anhydrous hydrofluoric acid. The pentafluoride vapors are condensed in a pyrex or quartz tube from which it is sublimed at 120°C under vacuum and collected as colorless crystals.
Also, niobium pentafluroide can be prepared by the reaction of fluorine with niobium pentachloride:
- 2NbCl5 + 5F2 → 2NbF5 + 5Cl2
External links
| Niobium compounds | |||
|---|---|---|---|
| Niobium(II) | |||
| Niobium(III) | |||
| Niobium(IV) | |||
| Niobium(V) |
| ||