Niobium oxychloride

Niobium oxychloride  File:NbOCl3polymer.tif

Names
IUPAC name

Niobium (V) Oxychloride

Other names

Niobium oxytrichloride

Identifiers

CAS Number

* 13597-20-1 Y

3D model (JSmol)

* Interactive image

PubChem CID

* 139509 has wrong formula

SMILES

* O=[Nb](Cl)(Cl)Cl

Properties

Chemical formula

| Cl3NbO
Molar mass | 215.26 g·mol−1
Appearance  | white crystals
Melting point | sublimes above 200 °C

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Y verify (what is YN ?)
Infobox references

Niobium oxychloride is the inorganic compound with the formula NbOCl3. It is a white, crystalline, diamagnetic solid. It is often found as an impurity in samples of niobium pentachloride, a common reagent in niobium chemistry.

## Structure

In the solid state the coordination sphere for niobium is a distorted octahedron. The Nb–O bonds and Nb–Cl bonds are unequal. This structure can be described as planar Nb2Cl6 core connected by O–Nb–O bridges. In this way, the compound is best described as a polymer, consisting of a double stranded chain.[1][2]

In the gas phase above 320 °C the Raman spectrum is consistent with a pyramidal monomer containing a niobium–oxygen double bond.[3]

Gaseous NbOCl3 is a tetrahedral molecule.

## Synthesis

Niobium oxychloride is prepared by treating the pentachloride with oxygen:[4]

NbCl5 \+ ⁠1/2⁠ O2 → NbOCl3 \+ Cl2

This reaction is conducted at about 200 °C. NbOCl3 also forms as a major side-product in the reaction of niobium pentoxide with various chlorinating agents such as carbon tetrachloride and thionyl chloride.[4][5]

2 Nb2O5 \+ 6 CCl4 → 4 NbOCl3 \+ 6 COCl2

## References

1. ↑ Ströbele, Markus; Meyer, Hans-Jürgen (2002). "Neubestimmung der Kristallstruktur von NbOCl3". Zeitschrift für anorganische und allgemeine Chemie 628 (2): 488–491. doi:10.1002/1521-3749(200202)628:2<488::AID-ZAAC488>3.0.CO;2-B.
2. ↑ Beck, Johannes; Bordinhão, Jairo (2005). "Polar [NbOCl3]2n and [NbOX−4]n (X = Cl, Br) Chains in the Structures of NbOCl3 and the Thallium-Halogenooxoniobates Tl[NbOCl4] and Tl[NbOBr4] — Synthesis, Crystal Structures and Optical Second Harmonic Generation". Zeitschrift für anorganische und allgemeine Chemie 631 (6–7): 1261–1266. doi:10.1002/zaac.200500041.NbOX−4]''n''+(X+=+Cl,+Br)+Chains+in+the+Structures+of+NbOCl3+and+the+Thallium-Halogenooxoniobates+Tl[NbOCl4]+and+Tl[NbOBr4]+—+Synthesis,+Crystal+Structures+and+Optical+Second+Harmonic+Generation&rft.jtitle=Zeitschrift+für+anorganische+und+allgemeine+Chemie&rft.aulast=Beck&rft.aufirst=Johannes&rft.au=Beck, Johannes&rft.au=Bordinhão, Jairo&rft.date=2005&rft.volume=631&rft.issue=6–7&rft.pages=1261–1266&rft_id=info:doi/10.1002/zaac.200500041&rfr_id=info:sid/en.wikibooks.org:Chemistry:Niobium_oxychloride">
3. ↑ Greenwood, N. N. (January 1, 1970). "Chapter 5: Vibrational Spectra". Spectroscopic Properties of Inorganic and Organometallic Compounds. Royal Society of Chemistry. p. 196. ISBN 9780851860237.
4. ↑ 4.0 4.1 G. Brauer (1963). Brauer, G.. ed. Handbook of Preparative Inorganic Chemistry. 2 (2nd ed.). New York: Academic Press. p. 1307.
5. ↑ Jena, P. K.; Brocchi, E. A.; Garcia, R. I. (1997). "Kinetics of chlorination of niobium pentoxide by carbon tetrachloride". Metallurgical and Materials Transactions B 28 (1): 39–45. doi:10.1007/s11663-997-0125-0. Bibcode: 1997MMTB...28...39J. .

* v
* t
* e

Niobium compounds

Niobium(II)|

* NbS
* NbO
* NbB2

Niobium(III)|

* NbN
* Nb2S3
* NbBr3
* NbF3

Niobium(IV)|

* NbCl4
* NbC
* NbF4
* NbS2
* NbSe2
* NbO2

Niobium(V)|

* NbBr5
* NbCl5
* NbF5
* NbI5
* NbOCl3
* Nb2O5
* LiNbO3
* KNbO3

| Organoniobium(V)|

* (C5H5)2NbCl2
* Nb2(OC2H5)10

|

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/Niobium oxychloride. Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Niobium_oxychloride&oldid=556335"
*[CID]: Compound ID
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template