Loading AI tools
Chemical compound From Wikipedia, the free encyclopedia
Niobocene dichloride is the organometallic compound with the formula (C5H5)2NbCl2, abbreviated Cp2NbCl2. This paramagnetic brown solid is a starting reagent for the synthesis of other organoniobium compounds. The compound adopts a pseudotetrahedral structure with two cyclopentadienyl and two chloride substituents attached to the metal. A variety of similar compounds are known, including Cp2TiCl2.
Names | |
---|---|
IUPAC name
Dichloridobis (η5-cyclopentadienyl)niobium | |
Other names
Niobocene dichloride | |
Identifiers | |
3D model (JSmol) |
|
ChemSpider | |
ECHA InfoCard | 100.159.630 |
EC Number |
|
PubChem CID |
|
RTECS number |
|
| |
| |
Properties | |
C10H10Cl2Nb | |
Molar mass | 294 g/mol |
Appearance | brown solid |
Melting point | dec. |
Boiling point | dec. |
soluble (hydrolysis) | |
Solubility in other solvents | sparingly in chlorocarbons |
Hazards | |
GHS labelling:[1] | |
Warning | |
H315, H319, H335 | |
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501 | |
Related compounds | |
Related compounds |
Cp2TiCl2 Cp2MoCl2 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
It was originally reported by Geoffrey Wilkinson.[2] It is prepared via a multistep reaction beginning with treatment of niobium pentachloride with cyclopentadienylsodium:[3]
The compound adopts a "clamshell" structure characteristic of a bent metallocene where the Cp rings are not parallel, the average Cp(centroid)-M-Cp angle being about 130.3°. The Cl-Nb-Cl angle of 85.6° is narrower than in zirconocene dichloride (97.1°) but wider than in molybdocene dichloride (82°). This trend is consistent with the orientation of the HOMO in this class of complex.[4]
Unlike the related zirconacene and titanocene dichlorides, no applications have been found for this compound, although it has been studied widely. It was investigated as a potential anti-cancer agent.[5]
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.