Niobium oxide trichloride

Crystal structure
General
Surname	Niobium oxide trichloride
other names	Niobium (V) oxychloride; Niobium oxychloride (ambiguous);
Ratio formula	NbOCl 3
Brief description	colorless solid
External identifiers / databases
Wikidata	Q4332917
properties
Molar mass	215.3 g mol −1
Physical state	firmly
density	3.05 g cm −3
solubility	Decomposes in water; soluble in sulfuric acid; insoluble in hydrochloric acid;
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Niobium oxide trichloride is an inorganic chemical compound of niobium from the group of oxychlorides .

Extraction and presentation

Niobium oxide trichloride can be produced by reacting niobium (V) chloride with oxygen at 150 ° C

{\ displaystyle {\ ce {2NbCl5 + O2 -> NbOCl3 + Cl2}}}

or obtained by hydrolysis.

{\ displaystyle {\ ce {NbCl5 + H2O -> \ NbOCl3 + 2HCl}}}

It is also possible to produce it by reacting niobium (V) oxide with thionyl chloride at 200 ° C.

{\ displaystyle {\ ce {Nb2O5 + 3SOCl2 -> 2NbOCl3 + 3SO2}}}

Or through the reaction of niobium (V) oxide and niobium (V) chloride:

{\ displaystyle {\ ce {Nb2O5 + 3NbCl5 -> 5NbOCl3}}}

Heated niobium (V) oxide in a stream of chlorine at 800–850 ° C also gives niobium oxide trichloride:

{\ displaystyle {\ ce {2Nb2O5 + 6Cl2 -> 4NbOCl3 + 3 O2}}}

properties

Niobium oxide trichloride is in the form of colorless needles. Above 350 ° C the decomposition into niobium (V) chloride and niobium (V) oxide begins. Like the corresponding yellow niobium oxide tribromide and black niobium oxide triiodide , it is very sensitive to moisture. In older literature, a tetragonal crystal structure with the space group P 4 ₂ / mnm (space group No. 136) , a = 1087 pm ; c = 396 pm, assumed, with recent investigations showing a non-centrosymmetric space group P 4 2 ₁m (No. 113) (omission of the mirror planes perpendicular to the double strands). In addition to this oxychloride of niobium, niobium oxide dichloride is also known. Template: room group / 136Template: room group / 113

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Georg Brauer: Handbook of preparative inorganic chemistry . 3., reworked. Edition. tape III . Enke, Stuttgart 1981, ISBN 3-432-87823-0 , pp. 1457 .

↑ ^a ^b ^c ^d Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 632 ( limited preview in Google Book search).

↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

↑ Christian Kusterer: REACTIONS, STRUCTURES AND PROPERTIES OF OXIDE HALOGENIDES AND HALOOXOMETALLATES OF NIOB AND TUNGSTEN ( Memento of the original from November 12, 2013 in the Internet Archive ) Info: The @1@ 2 archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. . (PDF; 3.4 MB), 2006 (dissertation).

[brauer-1] ↑ ^a ^b ^c ^d ^e ^f Georg Brauer: Handbook of preparative inorganic chemistry . 3., reworked. Edition. tape III . Enke, Stuttgart 1981, ISBN 3-432-87823-0 , pp. 1457 .

[Jean_d’Ans,_Ellen_Lax,_Roger_Blachnik-2] Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 632 ( limited preview in Google Book search).

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.